Michigan Highways Master List: 1913–Present

The Michigan Highways Master List is a complete catalogue of every state trunkline (I, US, and M) and Intercounty highway (A- through H-) route designation ever used in Michigan, from 1913 to today, including any auxiliary routes such as Alternate (ALT), Business (BUS), Business Loop (BL), Business Spur (BS), Bypass (BYP) Connector (CONN), Spur (SPUR), Temporary (TEMP) and Truck (TRK) routes and even a few archaic designations such as Extension (EXT) and Stub (STUB). This list was concieved out of many requests for information on route designations no longer in use, such as "Was there ever an M-41?" or "I heard about an ALTERNATE US-23. Was there such a thing?"

This page lists each designation in numerical order, from 1 through 696 followed by the Intercounty Highways, and is separated into listings generally corresponding to the initial setup of this website (e.g. 1-9, 10-19, etc.) for easier reference. Five 'types' of designations are included: current, unsigned, future and former routes, as well as those which have never been used to date. Each is color-coded, as shown in the "Highway Status Key" below. Current and Future route designations include a link to the regular listing on the website. The few Unsigned routes are also linked to a listing on the website. For those Formerly-Used designations, a short description of the former route is included for referencial purposes unless a Former Route Listing exists. Also included are route designations which were Planned But Never Implemented, for any number of possible reasons. Never-Used designations, of course, feature no description, as they have never existed in the system. The "Extant" column indicates the timeframe the route designation was in use.

With an undertaking of this magnitude, there may be a designation or two which have been overlooked or mis-stated. I have combed through thousands of sources and many hundreds of old road and street maps, so the information contained on this page is reasonably complete and accurate. However, if you should find any information which is incorrect, or if you know of a designation which has not been included here, please drop me a line at chris.bessert@gmail.com.

Michigan Highways Master List: 1913-Present

JUMP TO:	1-9 | 10-19 | 20-29 | 30-39 | 40-49 | 50-59 | 60-69 | 70-79 | 80-89 | 90-99 | 100-119 | 120-139
	140-159 | 160-179 | 180-199 | 200-229 | 230-696 | 700-712 | Alpha | "TO" | Intercounty Routes
USX127XBUS	XCURX	X9999X9999XX
		ROUTE STATUS KEY
	CUR	Current highway route designation
	UNS	Unsigned current highway route designation
	FUT	Future highway route designation
	FMR	Former highway route designation no longer used
	P/NU	Highway route designation which was planned but never implemented (for any number of possible reasons)
	NEV	Never-used as a state trunkline highway route designation (only noted for state trunkline routes, from 1 through 229)
Route	Status	Extant	Description -or- Link to Route Listing
M-1	CUR	1970—Now	M-1 Listing
US-2	CUR	1927—Now	US-2 Listing
US-2A	FMR	1933—1939	The original designation for what became M-54 through downtown Ironwood (1939–1942), which was then redesignated as BUS US-2.
US-2A	FMR	1931—1935	An alternate route for US-2 following a former alignment of US-2/US-41/M-35 north out of Escanaba via Wells which actually functioned more like a Business Route than an Alternate Route, but as Business Routes didn't debut in Michigan until c.1939 at the earliest, the MSHD used the "A" designation most of the time. (See Ironwood example above... and below!) The route itself was shown on official highway maps, but it was never labeled. Internal MSHD maps did label it, though, as did at least one 1933 AAA road map as well. (The 1932 USGS Topographic map for the area also lists this route as "US-2A & US-41A" implying both routes were signed as alternates here.)
US-2 BUS	CUR	1942—Now	IRONWOOD: BUS US-2 Listing
US-2 BUS	P/NU	c.1958	ST IGNACE: From internal State Highway Dept documents, the department was planning on designating the existing route of US-2 through St Ignace as a concurrent BL I-75/BUS US-2 once the I-75 freeway bypassing St Ignace was completed and opened to traffic. It seems unlikely any BUS US-2 route marker assemblies were ever posted along BL I-75 when that route debuted.
US-2 STUB	FMR	1929—1937?	A short, 0.4-mile long spur route from then-US-2 (present-day M-129/M-48) in downtown Pickford along Main St to 125 ft east of Manila Rd. Likely an unsigned trunkline. (No evidence any of the STUB routes were ever signed in the field.) Later designated as M-159 until 1937—not clear if M-159 was signed either.
M-2	FMR	1970s	Temporary, unsigned route designation used along the I-96/Jeffries Frwy services drives as the freeway was under construction in the early- to mid-1970s.
M-2	P/NU	1990s	Proposed for a freeway or arterial connecting highway running between I-275 and I-75 south of Detroit Metropolitan Airport in Wayne Co in the late-1980s or early-1990s, possibly with an extension to the west to US-23 south of Ann Arbor. The highway was never constructed.
M-3	FMR	1937—1939	M-3 Listing
M-3	CUR	1972—Now
M-4	FMR	c1935—1939 c1979—c1986	c1935 –1939: Original designation of M-134 in Mackinac and Chippewa Cos. c1979–c1986: Original designation of M-10/Northwestern Hwy from I-696/US-24 to northern terminus.
M-5	FMR	1926—1929	M-5 Listing
M-5	CUR	1977—Now
M-6	FMR	1926—1929 1970s	M-6 Listing
M-6	CUR	1997—Now
M-7	FMR	c1927—1940	Original designation of M-86.
US-8	CUR	1927—Now	US-8 Listing
M-8	CUR	1995—Now	M-8 Listing
M-9	FMR	1928—1929 1929—1940	Former M-9 Listing
M-9	P/NU	1980s– 1990s	Proposed designation for trunkline being studied in central and west-central Oakland Co to solve traffic issues caused by not constructing the I-275/M-275 freeway/parkway in the 1970s.
Route	Status	Extant	Description -or- Link to Route Listing
US-10	CUR	1927—Now	US-10 Listing
US-10A	FMR	1934—c1957	Predecessor to today's BUS US-10 in Midland.
US-10 BUS	CUR	1958—Now	REED CITY: BUS US-10 Listing
US-10 BUS	CUR	1975—Now	CLARE: BUS US-10 Listing
US-10 BUS	CUR	c1957—Now	MIDLAND: BUS US-10 Listing
US-10 BUS	FMR	c1940—1962	FLINT: Originally the route of US-10 through downtown Flint, later designated M-10, then given the BUS US-10 designation when Business routes debuted in Michigan around 1940. Replaced by BUS M-54, now a locally-maintained street.
US-10 BUS	P/NU	1959	FLINT: From internal State Highway Dept maps and documents, what eventually became I-475 through Flint was initially given the BUS US-10 designation. Once the Interstate route designations were finalized between the State Highway Dept and the federal government, the proposed freeway loop through downtown Flint became I-475.
US-10 BUS	FMR	1961—1986	PONTIAC: Originally US-10 throughthe center of Pontiac, designated BUS US-10 when US-10 replaced M-58. Now designated BUS US-24.
US-10 BUS	P/NU	1953 1959	SAGINAW: From internal State Highway Dept maps and documents, what eventually became I-675 through Saginaw was initially given the BUS US-10 designation. Once the Interstate route designations were finalized between the State Highway Dept and the federal government, the proposed freeway loop through downtown Saginaw became I-675. An even earlier proposal had been put forth in 1953 with a BUS US-10 routing using one-way pairs of streets to loop through the northern portion of the city, again along the general corridor which later became I-675.
US-10 CONN	FMR	1961—1975	The unsigned freeway connector between US-10 and US-27 east of Clare completed in 1961. Until the US-10/M-115 bypass of Clare and Farwell was completed in 1975, US-10 traveled along present-day BUS US-10 into downtown Clare, thus the segment of present-day US-10 between present-day Exits 98 and 158 was officially designated CONN US-10 south-to-eastbound and as CONN US-27 for west-to-northound traffic. Likely signed "TO US-10" in the eastbound direction (and "TO US-27" westbound).
US-10 TEMP	P/NU	1969	When US-10 was removed from the Woodward Ave alignment between Detroit and Pontiac and transferred to the route of the John C Lodge Frwy and US-24/Telegraph Rd, AASHO specified the "overlap" of US-10 and US-24 along Telegraph Rd be signed as TEMPORARY US-10. There is no evidence any "TEMP" signs were ever used along this route and it was always signed as simply part of US-10 from 1970–1986.
M-10	FMR	1913—1927 c1928—c1940	M-10 Listing
M-10	CUR	1986—Now
M-11	FMR	1913—1927 1927—1954	M-11 Listing
M-11	CUR	1961—Now
US-12	CUR	1927—Now	US-12 Listing
US-12A	FMR	c1931–1937?	An alternate routing for US-12 through the central part of Saint Joseph, running along Lake Blvd from Lakeshore Dr northerly to Ship St, then easterly along Ship to a terminus at US-12/US-31 at the cnr of Ship & Main Sts. Turned back to city control on Dec 29, 1937. (Thanks for bugging me, Marc...)
US-12A	FMR	1930—1956	Original route of US-12 along Michigan Ave between Kalamazoo and Comstock. Was decommissioned when M-96 replaced US-12 in this area. Route markers may have been removed from this route as early as 1954, but the highway itself was turned back to local control in 1956.
US-12A	FMR	1941-ish	Original route designation of the "Fort Custer Highway" being built by the State Hwy Dept through Fort Custer, generally along the approximate route of the former US-12 alignment through the area. The US-12A designation doesn't seem to have ever been applied to the route, though.
US-12A	FMR	1936—c1939	Original route of US-12 through downtown Battle Creek, designated as US-12A when US-12 bypassed the city center. Later designated BUS US-12.
US-12 BUS	FMR	1962—2010	NILES: FORMER BUS US-12 Listing
US-12 BUS	CUR	1962—Now	YPSILANTI: BUS US-12 Listing
US-12 BUS	FMR	1950s?	ST JOSEPH: While few State Highway Dept maps or documents refer to a BUS US-12 routing in downtown St Joseph, several official county road maps issued by the Berrien Co Road Commission did show one along Lake Blvd from US-12 at Main St north to Ship St and easterly along Ship St back to US-12. One State Highway Dept plan of the proposed Waukonda-Klock Expwy from 1953 also showed BUS US-12 in downtown St Joseph, but all official departmental trunkline determination maps do NOT show such a route. When more information on this route is found, it will be included here or on its own listing.
US-12 BUS	FMR	1957—c1960	KALAMAZOO: When the US-12 freeway was completed around Kalamazoo, the former route through downtown Kalamazoo was designated BUS US-12 for a time. Later changed to BL I-94.
US-12 BUS	FMR	c1939—1960	BATTLE CREEK: Mostly replaced the US-12A routing through downtown Battle Creek. Removed when I-94/US-12 freeway was completed south of Battle Creek.
US-12 BUS	FMR	1960	MARSHALL: Was designated for a short time before being replaced by BL I-94.
US-12 BUS	FMR	1960	ALBION: Was designated for a short time before being replaced by BL I-94.
US-12 BUS	FMR	1951—1960	JACKSON: Was designated along much of the former route of US-12 through downtown when the US-12 "Jackson Bypass" was built in stages. Replaced by the current BL I-94 designation.
US-12 BUS	FMR	?	ANN ARBOR: Potentially-signed soon after the completion of I-94/US-12 around the city, but if it was signed as BUS US-12, it was converted to BL I-94 soon after.
M-12	FMR	1913—1927	The pre-1926 designation of much of US-2 through the Upper Peninsula, from Ironwood to Sault Ste. Marie, with the exception of the portion from Crystal Falls to Sagola (now M-69) and Sagola to Iron Mountain (now M-95).
M-12A	FMR	1950s?	The "M-12A" designation may have never been actually posted in the field and it may have also never been an official route designation assigned by the State Highway Dept. It is included here as it was used by the MSHD on a mid-1950s map of Jackson Co along the "Jackson North Belt" bypass (from west of Parma to the Gillette Lake area in Leoni Twp) which became the US-12 freeway and is now part of I-94.
M-13	FMR	1913—1927 1927—1931 1931	M-13 Listing
M-13	CUR	1931—Now
M-13 CONN	CUR	1968—Now	M-13 CONN Listing
M-13 SPUR	FMR	1931	The initial designation for what was later (likely) signed as part of M-79 and then M-214 from Nashville to Vermontville. It was designated as such temporarily and assumedly never signed as such in the field, since its parent route, M-13, was also changed to M-14 likely before it was signed in the field between Battle Creek and Six Lakes in 1931.
M-14	FMR	1913—1930 1931—1942	M-14 Listing
M-14	CUR	1956—Now
M-14 BUS	P/NU	c.1965	From internal State Highway Dept documents, it appears the department was planning on designating a BUS M-14 route at Ann Arbor once the Ann Arbor "North Belt" freeway was opened. Unlike the proposed M-114 routing, BUS M-14 was shown as beginning at the eastern M-14 & US-23 jct then continuing southerly via US-23 to Plymouth Rd (the former M-14 routing), then following Plymouth Rd and Broadway from US-23 into downtown Ann Arbor. It would then turn southerly with BUS US-23 along N Main St, then follow BL I-94/Huron St westerly to I-94 on the west side of Ann Arbor. As with the proposed M-114 designation, it appears BUS M-14 was also never signed, as Plymouth Rd and Broadway within the City of Ann Arbor was transferred to city control within months of the opening of the M-14 "North Belt" freeway bypass.
M-14 SPUR	FMR	1931–1935	A 1.8-mile spur route in Barry Co along Assyria Rd connecting M-14 at the cnr of Assyria Rd & Lawrence Rd with M-79/Scott Rd to the north. Supplanted by a rerouted M-79 in early 1935.
M-14 SPUR	FMR	1931	After initially being designated as M-13 SPUR before its parent route was quickly redesignated as M-14, the M-14 SPUR from Nashville to Vermontville was likely signed as part of M-79 for several years until being designated as M-214 for several years.
M-15	FMR	1913—1927	M-15 Listing
M-15	CUR	1927—Now
US-16	FMR	1927–1962	Historic US-16 Listing
US-16A	FMR	c1933—1957	FARMINGTON: Designation for the "Farmington Cut-Off," a one-way bypass around the City of Farmington.
US-16 ALT	FMR	c.1940—1941	GRAND HAVEN: In the early 1940s, after US-16 was relocated onto the direct route between Nunica and Muskegon, the former route via M-104 and US-31 was designated ALT US-16 for a short time.
US-16 BUS	FMR	1953—1962	GRAND RAPIDS: When US-16 was transferred onto the southern and western bypass of Grand Rapids (the former BYP US-16) in 1953, the former route of US-16 through downtown Grand Rapids was designated BUS US-16.
US-16 BUS	P/NU	1958	HOWELL: From internal State Highway Dept maps and documents, what eventually became BL I-96 through Howell was initially given the BUS US-16 designation. Never signed as BUS US-16, as the US-16 designation was removed from the state upon completion of I-96 from Brighton, past Howell to the Lansing area. This route has always been signed as BL I-96.
US-16 BUS	FMR	1957—1961	FARMINGTON: For many years, the "Farmington Cut-Off" (now the M-5 freeway) was for eastbound traffic only, meaning the original route of US-16 along Grand River Ave through downtown Farmington retained the "official" routing of US-16. Later, when the "Cut-Off" was opened to two-way traffic and US-16 transferred to it, the former route of US-16 through Farmington was designated BUS US-16. Replaced by BL I-96 in the 1960s, now an unsigned state highway.
US-16 BYP	FMR	1942—1953	GRAND RAPIDS: When originally constructed, the "Grand Rapids Beltline System" was designated M-114. Later in 1942, the southern and western legs were given the BYP US-16 designation as an alternate route around downtown Grand Rapids. Then in 1953, given the mainline US-16 designation, now designated M-11.
M-16	FMR	1913—1927	Ironically, what was to become US-16 in 1926 was originally designated M-16 in 1918. Ran along the present I-96 corridor from Grand Haven through Grand Rapids and Lansing, ending in Detroit.
M-17	CUR	1913—Now	M-17 Listing
M-17 BUS	FMR	1944—1956	YPSILANTI: When the BYP US-112 freeway opened around the south side of Ypsilanti (now I-94/US-12) in August 1944, M-17 was transferred to that route and the original route of M-17 through downtown Ypsilanti along Ecorse Rd, Michigan Ave and Washtenaw Ave was designated BUS M-17. Now designated M-17.
US-18	P/NU	1926	Under the first iteration of the US Highway system as laid out in 1926, the route which would eventually become US-16 from Detroit through Howell, Lansing, Portland, Grand Rapids to Grand Haven was originally assigned the US-18 designation. (In this early iteration, US-10 was to be designated US-12, US-12 was given the US-10 designation, and US-112 was designated US-110.) In the final US Highway system approved by AASHO in 1927, thoiugh, US-18 was instead designated as US-17, which interestingly had been previously designated as M-16 throughout Michigan.
M-18	CUR	1914—Now	M-18 Listing
M-19	FMR	1913—1927	M-19 Listing
M-19	CUR	1927—Now
Route	Status	Extant	Description -or- Link to Route Listing
M-20	CUR	1913—Now	M-20 Listing
M-21	CUR	1913—Now	M-21 Listing
M-21A	FMR	c.1933?	The intial (or initially proposed) designation for M-210, the former route of M-21 through Pewamo in eastern Ionia Co.
M-21A	FMR	1929—1949	A parallel route to M-21 along Lapeer Rd from US-10/Dort Hwy (now M-54) to M-15 at Davison. Likely utilized short sections of US-10 and M-15 to connect back with M-21 at either end. Now a locally-maintained road.
M-21 BUS	FMR	1953—1974	GRAND RAPIDS: When the M-21 desingation was transferred onto the routing of BYP M-21 around Grand Rapids, the former route of M-21 through the City of Grand Rapids was designated BUS M-21. While the eastern half of this route is now a locally-maintained street, the western half became BS I-196.
M-21 BYP	FMR	1944—1953	GRAND RAPIDS: When originally constructed, the "Grand Rapids Beltline System" was designated M-114. Later, the eastern and southern legs were given the BYP M-21 designation in 1944 as an alternate route around downtown Grand Rapids. Then given the primary M-21 designation in 1953, now designated as parts of M-37 and M-11.
M-21 CONN	FMR	1972—2004?	GRAND RAPIDS: A short connector route between M-37/M-44/East Beltline Ave and M-21 at I-96 Exit 39 from when M-21 continued westerly along I-96 and then I-196 through Grand Rapids and then via Chicago Dr through Hudsonville to Holland. When M-21 was truncated back to I-96 at Exit 39 in 1974, evidence points to CONN M-21 existing possibly until as late as 2004 until it was incorporated into the route of mainline M-21 and decommissioned.
M-21 STUB	FMR	1929—1934?	Initially a spur route from M-21 in downtown Lyons travelling northerly for 1.4 miles into downtown Muir, once the new route of M-21 was completed on the north side of the Grand River between Ionia and Pewamo in 1931, M-21 STUB simply "reversed" and became a spur route from M-21 at Muir heading southerly 1.4 miles into downtown Lyons (along the same, unchanged route). "M-21 STUB" is likely an internal, unsigned designation. The spur is labeled as M-166 on official highway maps beginning in 1934 and that route is extended from Lyons to Portland a year later.
M-22	CUR	1913—Now	M-22 Listing
M-22A	NEV	—	A tourist map published in the 1950s titled "Leelanau County The Land of Delight Cool Tourism Map" featured a map of Leelanau Co with the state trunklines and numbered county routes depicted. The map shows Co Rd 633 (Cherry Bend Rd and Center Hwy) between Greilickville and Suttons Bay as "M-22A" with state highway marker symbols, while this route was part of M-22 in the 1930s (south of Crain Hill Rd) and through the 1940s (Crain Hill Rd northerly), absolutely no evidence that this was ever designated as M-22A has been located. In fact, the Co Rd 633 alignment was turned back to local control on the same date as the new M-22 route closer to the Grand Traverse Bay shoreline was established. "M-22A" is included here as a never-used route designation in case others have questions on its existence.
M-22 STUB	FMR	c.1931	Former M-168 listing
US-23	CUR	1927—Now	US-23 Listing
US-23A	FMR	c.1967	The Michigan State Highway Dept originally designated M-13 from Kawkawlin to Standish as ALT US-23 when the current I-75/US-23 freeway was completed in 1967. MSHD actually posted the former US-23 as "ALT US-23," but when that designation was not approved by the AASHTO, the department gave in and extended the M-13 designation along the route.
US-23A	FMR	c1929—c1931	Another short-lived US-23A designation existed from c.1929-1930 when a new US-23 routing was built on the east shore of the Saginaw River between Saginaw and Bay City. The former route was designated US-23A for only a short time, assumedly since the AASHTO declined to okay this new designation. By 1931, US-23A had been redesignated as part of M-47.
US-23 BUS	CUR	1962—Now	ANN ARBOR: BUS US-23 Listing
US-23 BUS	FMR	1958—2006	FENTON: Former BUS US-23 Listing
US-23 BUS	FMR	1953—1960	SAGINAW: When the eastern US-23 bypass around Saginaw was completed from Bridgeport to M-81, the former route of US-23 through the center of Saginaw was redesignated BUS US-23. When I-75 was routed along the bypass, BUS US-23 was redesignated as BL I-75.
US-23 BUS	FMR	1941—1960	BAY CITY: When US-23 was routed out of downtown Bay City to run west along present M-84/Salzburg Ave and north along present M-13/Euclid Ave, the former route of US-23 through downtown Bay City was designated as BUS US-23. Now designated, in parts, as M-84 and M-25/BS I-75.
US-23 BUS	CUR	1942—Now	ROGERS CITY: BUS US-23 Listing
M-23	FMR	1913—1927	Former M-23 Listing
US-24	CUR	1927–Now	US-24 Listing
US-24A	FMR	c1946—1959	The original US-24A in Monroe Co ran north from the Ohio state line via the Summit St extension to US-25 at Erie, then north for a short bit with US-24, then west on Luna Pier Rd to US-24. (This had been previously designated as US-25A.) Then, when the Detroit-Toledo Expressway was completed from the Ohio state line northerly past Monroe to the Woodhaven area of Wayne Co, it was designated US-24A. A few years later, US-24A was decommissioned in favor of the I-75 designation.
US-24 BUS	CUR	1986—Now	PONTIAC: BUS US-24 Listing
US-24 CONN	CUR	1965?—Now	ERIE: CONN US-24 Listing
US-24 CONN	CUR	1973—Now	WOODHAVEN: CONN US-24 Listing
US-24 CONN	CUR	1967—Now	TAYLOR: CONN US-24 Listing
M-24	CUR	1913–Now	M-24 Listing
M-24A	FMR	1936—1940	The original routing of M-24 through downtown Pontiac. Redesignated as BUS M-24 when Business routings debuted in Michigan c.1940. This entire route was re-designated as BL I-75 when I-75 was completed around the east side of Pontiac in the 1960s.
M-24 BUS	FMR	1940—1963	PONTIAC: Originally M-24A through downtown Pontiac, but redesignated as BUS M-24 when Business routings debuted in Michigan c.1940. This entire route was re-designated as BL I-75 when I-75 was completed around the east side of Pontiac in the 1960s.
US-25	FMR	1927–1973	Historic US-25 Listing
US-25A	FMR	c1941-42 —c1946	The original highway designation of the Summit St extension from the Ohio state line to US-25 at Erie in southeastern Monroe Co. Later redesignated US-24A.
US-25A	FMR	1940—1964	An alternate routing on the north side of Port Huron. Later the US-25 designation was transferred onto US-25A, supplanting that designation. Now designated as part of M-25.
US-25 BUS	FMR	1964—1973	PORT HURON: When I-94 was completed around the west side of Port Huron, US-25 was transferred to the new freeway, and the old routing of US-25 through downtown Port Huron was given the BUS US-25 designation. Later designated M-25, now BL I-94.
M-25	FMR	1913—1927	M-25 Listing
M-25	CUR	1933—Now
M-26	CUR	1913—Now	M-26 Listing
US-27	FMR	1927—2002	Historic US-27 Listing
US-27A	FMR	1930—1961	One of the earliest Alternate US Highways in the nation. The US-27 mainline ran northerly into St. Louis, while US-27A ran west into downtown Alma, then north back to US-27 west of St. Louis and north of Alma. When the US-27 freeway was completed at St. Louis and Alma in the 1960s, this US-27A routing was redesignated as BUS US-27, a "mirror-image" of St. Louis' BUS US-27.
US-27A	FMR	1930—1939	When US-27 was moved to a bypass routing west of Shepherd along Federal Rd, the former route through Shepherd was designated US-27A. This designation was dropped in the 1930s and was never designated BUS US-27.
US-27 BUS	FMR	c1967	COLDWATER: When the I-69/US-27 freeway was completed past Coldwater in the late-1960s, a BUS US-27 designation may have commissioned concurrently with BL I-69—it was shown as such on some internal State Highway Dept maps. If it was actually signed in the field, this designation likely only survived a year or two at most.
US-27 BUS	FMR	c1967—1971	MARSHALL: When the I-69/US-27 freeway was completed west of Marshall in the late-1960s, a BUS US-27 designation was commissioned along Michigan Ave from I-69/US-27 easterly into downtown Marshall, then northerly along the former US-27 to I-94. This designation survived for several years before being removed.
US-27 BUS	FMR	1961—1974	CHARLOTTE: The original routing of US-27 through downtown Charlotte, commissioned when the US-27 bypass was completed. Survived for a couple years after the coming of I-69, but was eventually replaced by the current BL I-69 routing.
US-27 BUS	FMR	1985—2002	LANSING: One of eight BUS US-27 routings replaced by a BUS US-127 designation when US-27 from Lansing northerly was redesignated as US-127 in 2002.
US-27 BUS	FMR	1951—1964	ST JOHNS: An early BUS US-27 routing in St Johns running along a bypass alignment of US-27 on the eastern edge of the city.
US-27 BUS	FMR	1996—2002	ST JOHNS: One of eight BUS US-27 routings replaced by a BUS US-127 designation when US-27 from Lansing northerly was redesignated as US-127 in 2002.
US-27 BUS	FMR	1961—2002	ITHACA: One of eight BUS US-27 routings replaced by a BUS US-127 designation when US-27 from Lansing northerly was redesignated as US-127 in 2002.
US-27 BUS	FMR	1961—2002	ALMA: One of eight BUS US-27 routings replaced by a BUS US-127 designation when US-27 from Lansing northerly was redesignated as US-127 in 2002.
US-27 BUS	FMR	1961—2002	ST LOUIS: One of eight BUS US-27 routings replaced by a BUS US-127 designation when US-27 from Lansing northerly was redesignated as US-127 in 2002.
US-27 BUS	FMR	1961—2002	MOUNT PLEASANT: One of eight BUS US-27 routings replaced by a BUS US-127 designation when US-27 from Lansing northerly was redesignated as US-127 in 2002.
US-27 BUS	FMR	1961—2002	CLARE: One of eight BUS US-27 routings replaced by a BUS US-127 designation when US-27 from Lansing northerly was redesignated as US-127 in 2002.
US-27 BUS	FMR	1961—2002	HARRISON: One of eight BUS US-27 routings replaced by a BUS US-127 designation when US-27 from Lansing northerly was redesignated as US-127 in 2002.
US-27 CONN	FMR	1961—1975	The unsigned freeway connector between US-10 and US-27 east of Clare completed in 1961. Until the US-10/M-115 bypass of Clare and Farwell was completed in 1975, US-10 traveled along present-day BUS US-10 into downtown Clare, thus the segment of present-day US-10 between present-day Exits 98 and 158 was officially designated CONN US-10 south-to-eastbound and as CONN US-27 for west-to-northound traffic. Likely signed "TO US-27" in the westbound direction (and "TO US-10" eastbound).
US-27 TRK	FMR	c1936—1950	For many years, there were two routings for US-27 and M-78 through downtown Lansing. The US-27/M-78 "Passenger Car Route" ran along Capitol Ave and Saginaw St. (This would be considered the "mainline" routing.) A US-27/M-78 "Truck Route" ran east on Main St, north on Grand Ave, east on Kalamazoo Ave and north on Larch St. TRUCK US-27/TRUCK M-78 was eventually replaced by the mainline US-27/M-78 when the Capitol Ave routing was given back to local control.
M-27	FMR	1913—1927	M-27 Listing
M-27	CUR	1961—Now
M-28	CUR	1913—Now	M-28 Listing
M-28A	FMR	1937—1958?	The original route of US-41/M-28 through Ishpeming and Negaunee in Marquette Co. Was paired with US-41A at this time. Later replaced by the current BUS M-28 designation.
M-28A	FMR	1935—1949	The original route of M-28 through Newberry. Later redesignated as BUS M-28.
M-28 BUS	CUR	1958—Now	ISHPEMING/NEGAUNEE: BUS M-28 Listing
M-28 BUS	FMR	1963—1981?	MARQUETTE: The original route of US-41/M-28 through downtown Marquette on Front and Washington Sts, and was paired with a BUS US-41 designation. While the BUS US-41 routing survives, BUS M-28 no longer runs through downtown Marquette.
M-28 BUS	FMR	1949—1953	NEWBERRY: Originally designated M-28A, earlier this was the original routing of M-28 through Newberry. Newberry's BUS M-28 was mostly given back to local control.
M-29	FMR	1913—1927	M-29 Listing
M-29	CUR	1927—Now
M-29 BYP	FMR	c.1948?	MOUNT CLEMENS: A possibly short-lived route designation at Mount Clemens shown on State Highway Dept State Trunkline County Atlases in 1948. These were mostly internal documents and may not have reflected a designation that was signed in the field. BYP M-29, if it existed, was part of mainline M-29 by 1949.
Route	Status	Extant	Description -or- Link to Route Listing
M-30	CUR	1914—Now	M-30 Listing
US-31	CUR	1927—Now	US-31 Listing
US-31A	FMR	c1936—1938	The original routing of US-31 between Saugatuck and Holland. When a newer alignment was completed (the present-day A-2/Blue Star Hwy) between those cities, the old US-31 routing was redesignated as US-31A. The designation was dropped in the late-1930s.
US-31A	FMR	1932—1940 1940—c1941	US-31A was the original downtown Muskegon bypass along Getty and Marquette Aves. Later, US-31 was transferred onto the US-31A alignment, and US-31A was moved onto the former US-31 routing through downtown Muskegon. US-31A was redesignated BUS US-31 in the 1940s, and retains that designation today.
US-31A	FMR	1931—1937	As with Muskegon, US-31 was the orignal bypass of Ludington along Pere Marquette Rd, while US-31 continued to jog through downtown Ludington. Later replaced by the mainline US-31 routing. when the "through-town" route of US-31 was cancelled and turned back to local control.
US-31A	FMR	?	A purported "business" routing through downtown Beulah. US-31A was a very short highway running one block west of US-31, and likely an original routing of US-31 through the city. Now a locally-designated street.
US-31 BUS	FMR	1987—20__?	NILES: FORMER BUS US-31 Listing
US-31 BUS	FMR	c1963	ST. JOSEPH: Immediately after US-31 was transferred onto its current I-94 and I-96 (I-196) bypass routing around St. Joseph and Benton Harbor, the former route of US-31 through downtown St. Joseph was designated BUS US-31. (BUS US-31 was paired with US-33 throughout.) Another State Highway Dept map indicated the original plans for BUS US-31 to run concurrently with BL I-94 from downtown St Joseph, through Benton Harbor to a terminus at I-94/US-31 east of Benton Harbor. The BUS US-31 routing at St Joseph lasted for only about a year and the route became just US-33, now designated M-63.
US-31 BUS	FMR	1942—1963	SOUTH HAVEN: When the original bypass of South Haven was completed in the 1940s, the former route of US-31 through downtown South Haven was designated BUS US-31. The southern half of this route is now part of BL I-196.
US-31 BUS	FMR	1954—2004	HOLLAND: FORMER BUS US-31 Listing
US-31 BUS	CUR	c1941—Now	MUSKEGON: BUS US-31 Listing
US-31 BUS	CUR	1964—Now	WHITEHALL-MONTAGUE: BUS US-31 Listing
US-31 BUS	CUR	1975—Now	HART: BUS US-31 Listing
US-31 BUS	FMR	1955—2023	PENTWATER: FORMER BUS US-31 Listing
US-31 BUS	CUR	2005—Now	LUDINGTON: BUS US-31 Listing
M-31	FMR	1913—1927	FORMER M-31 Listing
M-32	CUR	c1916—Now	M-32 Listing
M-32 BUS	CUR	c1940?—Now	BUS M-32 Listing
US-33	FMR	1938—1998	Historic US-33 Listing
M-33	CUR	1916—Now	M-33 Listing
M-34	CUR	1915—Now	M-34 Listing
M-35	CUR	1915—Now	M-35 Listing
M-35A	FMR	c.1948?	An early designation for what is now BUS M-28 through downtown Ishpeming and Negaunee, dating to a decade before the highway was re-assumed back into the trunkline system. May have been "marked-and-maintained" route. Shown as such on at least one internal State Highway Dept map
M-36	FMR	1913—1926	M-36 Listing
M-36	CUR	1931—Now
M-36 STUB	FMR	c1930	M-36 STUB, although likely never signed as such in the field and being an internal MSHD designation, was a mile-long "stub" route from M-36 on the Lapeer/Tuscola Co line heading westerly to a terminus in "downtown" Fostoria. Sometime after becoming a state route in 1930, it was given the proper route designation of M-169, which it kept until being decommissioned in 1935.
M-37	CUR	1913—Now	M-37 Listing
M-38	FMR	1913—1961	M-38 Listing
M-38	CUR	1968—Now
M-39	FMR	1913—1938 1939—1959	M-39 Listing
M-39	CUR	1959—Now
Route	Status	Extant	Description -or- Link to Route Listing
M-40	CUR	1913—Now	M-40 Listing
US-41	CUR	1927—Now	US-41 Listing
US-41A	FMR	?	The original route of US-41/M-28 through Ishpeming and Negaunee in Marquette Co. Was paired with M-28A at this time. Later replaced by the current BUS M-28 designation.
US-41A or US-41 ALT	P/NU	c.1960	Proposed to run along existing BUS M-28 from downtown Negaunee northerly to existing US-41/M-28 north of downtown, then westerly via present-day US-41/M-28 to West Ishpeming. This proposed US-41A or ALT US-41 designation was to be implemented in concert with the proposed rerouting of US-41 directly north from Powers through Gwinn to Negaunee, then westerly through downtown Ishpeming to existing US-41 west of the city.
US-41 BUS	FMR	1963—2005	MARQUETTE: FORMER BUS US-41 Listing
US-41 BUS	P/NU	1966—1970	ISHPEMING/NEGAUNEE: Michigan State Highway Department officialls attempted on a few occasions between 1966 and 1970 to convince AASHO officials to allow them to add the BUS US-41 designation to the existing BUS M-28 routing at Ishpeming/Negaunee (or, possibly, to replace BUS M-28—that is somewhat unclear). The applications were denied by AASHO due to the existing railroad grade crossings and the level of railroad traffic at the time. With most of those crossings since eliminated, State officials have not attempted to add the BUS US-41 designation since 1970.
US-41 BUS	FMR	1940—1957	BARAGA: The original route of US-41 through downtown Baraga, running from M-35/State St southerly along Superior St back to US-41 at the southern city limit. Existed from 1940 when the current US-41 was built bypassing the downtown area and was cancelled in mid-1957 and turned back to local control.
US-41 SPUR	FMR	1929—1976	US-41 SPUR, although likely never signed as such in the field and being an internal MSHD designation, was the designation for the one-block long spur route along 15th St from US-41 to 10th Ave in Menominee.
US-41 STUB	FMR	1931—?	US-41 STUB, although likely never signed as such in the field and being an internal MSHD designation, was the initial designation for the spur route linking US-41 in Menominee with the Ann Arbor Railroad carferry docks in 1931. Sometime after becoming a state route, it was given the proper route designation of M-173.
M-41	FMR	1915—1927	Former M-41 Listing
M-42	CUR	1913—Now	M-42 Listing
M-43	FMR	c1919—c1923	M-43 Listing
M-43	CUR	1923—Now
M-43 BUS	FMR	1959—1968	GRAND LEDGE: When the current M-43 bypass routing around Grand Ledge was completed, the former route through downtown was designated BUS M-43 for a time.
M-44	CUR	1913—Now	M-44 Listing
M-44 CONN	CUR	1969—Now	CONN M-44 Listing
US-45	CUR	1935—Now	US-45 Listing
M-45	FMR	1917—1935	M-45 Listing
M-45	CUR	1964—Now
M-46	CUR	1913—Now	M-46 Listing
M-47	CUR	1913—Now	M-47 Listing
M-48	CUR	1915—Now	M-48 Listing
M-49	FMR	1914—1931	M-49 Listing
M-49	CUR	1931—Now
Route	Status	Extant	Description -or- Link to Route Listing
M-50	CUR	1915—Now	M-50 Listing
M-50 BUS	FMR	1953—1961	GRAND RAPIDS: Formerly routed through downtown Grand Rapids, when M-50 was moved to the "Grand Rapids Beltline system" in 1953, the former route through downtown was designated as BUS M-50. It later re-attained the M-50 designation in 1961, then M-45 in 1964, now mostly a local street.
M-51	FMR	1913—1927 1927—1965	M-51 Listing
M-51	CUR	1971—Now
M-52	CUR	1915—Now	M-52 Listing
M-53	CUR	1919—Now	M-53 Listing
M-54	FMR	1915—1927 1939—1942	M-54 Listing
M-54	CUR	1962—Now
M-54 BUS	FMR	1962—1974	FLINT: When US-10 was transferred to the I-75/US-23 freeway around the west side of Flint, US-10 in Genesee Co was redesignated M-54, and BUS US-10 through Flint was accordingly redesignated as BUS M-54. When the first segment of the I-475/Buick Freeway was completed from I-75 south of Flint to M-78/M-21 in downtown Flint, the BUS M-54 designation was removed and portions of the route became an unsigned trunkline for many years.
M-55	CUR	1915—Now	M-55 Listing
M-55 BUS	FMR	1950—1961	HOUGHTON LAKE HEIGHTS: For many years, M-55 turned south to run concurrently with US-27, then turned east back to its current alignment at Houghton Lake, effectively bypass Houghton Lake Heights. The former route of M-55 through the Heights bore the BUS M-55 during this timeframe. It is now part of the M-55 mainline again.
M-56	FMR	1913—1966 1971—1984	Former M-56 Listing
M-57	FMR	1915—1926 1926—1928	M-57 Listing
M-57	CUR	1930—Now
M-58	FMR	1913—1927 1927—1961	M-58 Listing
M-58	CUR	1971—Now
M-59	CUR	1915—Now	M-59 Listing
M-59 CONN	FMR	c1968–c1998	For many years, M-59 turned northeasterly to run concurrently with US-25 (later M-3) along Gratiot Ave then easterly on 23 Mile Rd where M-59 terminated at the southern terminus of M-29 (and from 1974 on, the northern terminus of M-3). The segment of Hall Rd/Wm P Rosso Hwy from Gratiot Ave east to (future) I-94 that not turned back to local control when the remainder of the former M-59 route east of I-94 along Wm P Rosso Hwy and Jefferson Ave to New Baltimore was cancelled in 1961 and was an unsigned connector route. Official designation of CONN M-59 first appears on internal Dept of State Highways maps in c1968, but may have existed as early as 1961. Removed in 1998 when M-59 was extended east from M-3/Gratiot Ave along a much-improved Hall Rd/Wm P Rosso Hwy to terminate at I-94.
Route	Status	Extant	Description -or- Link to Route Listing
M-60	CUR	1916—Now	M-60 Listing
M-60A	FMR	1933	A very short-lived highway, existing at Concord in Jackson Co in 1933. Not only short-lived, it was a short highway in length as well, running along present Homer Rd and Hanover St, acting like a "Business route" into downtown Concord, while M-60 bypassed the center of town to the north. Establishment in early 1933 during Dillman era rescinded in July 1933 by the incoming Van Wagoner administration.
M-60 BUS	CUR	1956—Now	BUS M-60 Listing
M-61	CUR	1916?—Now	M-61 Listing
M-62	CUR	1913—Now	M-62 Listing
M-63	FMR	1917—1961	M-63 Listing
M-63	CUR	1986—Now
M-64	FMR	1915—1929 1929—1930	M-64 Listing
M-64	CUR	1930—Now
M-65	FMR	1913—1927	M-65 Listing
M-65	CUR	1931—Now
M-66	CUR	1915—Now	M-66 Listing
I-67	P/NU	1957—1958	Original desigation for the never-built Interstate between Kalamazoo and South Bend as adopted by the American Association of State Highway Officals (AASHO) on the "Official Route Numbering for the National System of Interstate and Defense Highways" map issued August 14, 1957. The original I-67 was later swapped out for a northerly extension of I-69 from Indiana to Marshall. The Michigan State Highway Dept then suggested redesignating what was then part of I-96 from Benton Harbor past Holland to Grand Rapids (unbuilt from Holland to Grand Rapids) as I-69 while moving the I-96 designation to what was then I-196 between Grand Rapids and Muskegon. AASHO instead approved jsut flip-flopping the I-96 and I-196 designations, reserving I-67 for "future Interstate expansion"... which has yet to occur many decades later.
M-67	CUR	1916—Now	M-67 Listing
M-68	FMR	1914—1927	M-68 Listing
M-68	CUR	1935—Now
I-69	CUR	1967—Now	I-69 Listing
I-69 BL	CUR	1967—Now	COLDWATER: BL I-69 Listing
I-69 BL	CUR	1974—Now	CHARLOTTE: BL I-69 Listing
I-69 BL	CUR	1987—Now	LANSING-EAST LANSING: BL I-69 Listing
I-69 BL	CUR	c1986—Now	PORT HURON: BL I-69 Listing
I-69 BS	FMR	1984—c1986	PORT HURON: BL I-69 Listing
I-69 TEMP	FMR	1974—1992	Existed from 1973 until 1992, connecting completed portions of I-69 in Mid-Michigan and likely the only route ever officially designated "TEMPORARY" in Michigan. In 1973, the portion of the M-78 freeway from Morrice to Flint was redesignated as part of I-69 and all of M-78 from Charlotte to Morrice was redesignated as TEMPORARY I-69. The route of TEMP I-69 followed US-27 from Charlotte to I-96 southwest of Lansing, ran easterly on I-96 to I-496/US-127, then north on I-496 and US-127 to Saginaw Rd, then northeasterly out of the Lansing area, connecting to the I-69 freeway Morrice. TEMP I-69 was cut into to pieces in 1987 when the portion of I-69 from I-96 southwest of Lansing in Eaton Co to Exit 94 north of Haslett in Clinton Co was designated as such. The portion of the former TEMP I-69 from US-127 to Exit 94 became part of a new BL I-69. The eastern segment of TEMP I-69 from Exit 94 to Morrice was replaced by a completed I-69 freeway in 1990, while the western segment of TEMP I-69 from Charlotte to I-96 was completely replaced by October 1992, when the final segment of I-69 was completed.
M-69	FMR	1915—1927	M-69 Listing
M-69	CUR	1927—Now
Route	Status	Extant	Description -or- Link to Route Listing
M-70	FMR	1913—1959	Former M-70 Listing
M-71	CUR	1917—Now	M-71 Listing
M-72	CUR	1917—Now	M-72 Listing
I-73	P/NU	1991—2001	The Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA) defined High Priority Corridor 5, the "I-73/74 North–South Corridor" from Charleston SC to Portsmouth OH, to Cincinnati OH and Detroit. The National Highway System Designation Act of 1995 added a branch from Toledo OH to Sault Ste Marie via the US-223, US-127 US-27 and I-75 corridors. MDOT abandoned further study of I-73 after June 12, 2001, diverting remaining funding to safety improvement projects along the corridor.
M-73	CUR	1919—Now	M-73 Listing
M-74	FMR	1920—1939	In 1920, M-74 existed as a "cut-off" route for M-14 (US-27's predecessor route) in Clare and Missaukee Counties. Beginning at M-14 north of Harrison, M-74 ran west to Leota, then northerly through Moddersville and Butterfield, ending at M-14 at Merritt. (During that time, M-14 bent west, then north from Houghton Lake to connect with M-13 south of Kalkaska, instead of continuing northerly past Houghton and Higgins Lakes toward Grayling.) In 1923, M-14 was routed to the east of Houghton and Higgins Lakes on the later route of US-27. The former route of M-14 in Missaukee Co from Merrit northerly to Moorestown, then west to Pioneer was redesignated as an extension of M-74.All of M-74 south of Moddersville (via Leota to M-14 north of Harrison) was turned back to local control in 1925, making M-74 a spur-route south of Merritt. The southern spur from Merritt to Moddersville was removed in 1938, with the remainder of M-74 being removed in 1939.
I-75	CUR	1958—Now	I-75 Listing
I-75 BL	FUT	Proposed	MONROE: Proposed new route (under study/consideration). A route along the potential alignment of an BL I-75 at Monroe first showed up on internal State Highway Dept maps in 1962. Mentions of studies and planning for a potential BL I-75 at Monroe continue sporadically until the early 2000s, but may no longer be under active consideration.
I-75 BL	CUR	1963—Now	PONTIAC: BL I-75 Listing
I-75 BL	FMR	1960—c1971	SAGINAW: When I-75 was completed around the east side of Saginaw, what had been designated BUS US-23 was redesignated as BL I-75. This routing lasted until the coming of I-675 in the early 1970s.
I-75 BL	FMR	1960—1971	BAY CITY: See BS I-75 Listing
I-75 BS	CUR	1971—Now	BAY CITY: BS I-75 Listing
I-75 BL	CUR	1973—Now	WEST BRANCH: BL I-75 Listing
I-75 BL	CUR	1973—Now	ROSCOMMON: BL I-75 Listing
I-75 BL	CUR	1961—Now	GRAYLING: BL I-75 Listing
I-75 BL	CUR	1986—Now	GAYLORD: BL I-75 Listing
I-75 BL	CUR	1960—Now	ST IGNACE: BL I-75 Listing
I-75 BS	CUR	1962—Now	SAULT STE MARIE: BS I-75 Listing
M-75	FMR	1917—1927	M-75 Listing
M-75	CUR	1933—Now
M-76	FMR	1914—1973	Former M-76 Listing
M-76 BUS	FMR	1972—1973	For about one year in the early 1970s, BUS M-76 existed through downtown West Branch, originating when the M-76 freeway was completed around the city. In 1973, BUS M-76 was redesignated BL I-75 when M-76 was redesignated I-75.
I-77	P/NU	1957—1958	Original desigation for I-94 between Detroit and Port Huron as adopted by the American Association of State Highway Officals (AASHO) on the "Official Route Numbering for the National System of Interstate and Defense Highways" map issued August 14, 1957. Later requested to be changed to be part of an extension of I-94 by the Michigan State Highway Dept.
M-77	CUR	1919—Now	M-77 Listing
M-78	CUR	1920—Now	M-78 Listing
M-78 BUS	P/NU	c.1960	CHARLOTTE: Planned as a companion route designation for BUS US-27 (present-day BL I-69) at Charlotte on planning maps from 1960. No evidence this route was ever implemented and signed in the field.
M-78 BUS	FMR	1963—1974	LANSING: When M-78 was routed around Lansing via I-96 and I-496 in 1963, the former route through downtown Lansing was designated BUS M-78. The route lasted until 1970.
M-78 TRK	FMR	1937–1950	For many years, there were two routing of US-27 and M-78 through downtown Lansing. The US-27/M-78 "Passenger Car Route" ran along Capitol Ave and Saginaw St. (This would be considered the "mainline" routing.) A US-27/M-78 "Truck Route" ran east on Main St, north on Grand Ave, east on Kalamazoo Ave and north on Larch St. TRUCK US-27/TRUCK M-78 was eventually replaced by the mainline US-27/M-78 when the Capitol Ave routing was given back to local control.
M-79	CUR	1919–Now	M-79 Listing
Route	Status	Extant	Description -or- Link to Route Listing
M-80	FMR	1919—1926 1927—1929	M-80 Listing
M-80	CUR	1995—Now
M-81	CUR	1919—Now	M-81 Listing
M-82	FMR	1919—1925	M-82 Listing
M-82	CUR	1925—Now
M-83	FMR	1919—1921 1921—1926	M-83 Listing
M-83	CUR	1926—Now
M-83 BUS	P/NU	c.1960—1961	Originally proposed designation for what had been designated BUS US-10 along Saginaw St from north of Mount Morris, southerly through downtown Flint to Grand Blanc, with US-10 along Dort Hwy becoming a southerly extension of existing M-83. In the end, US-10 through Genesee Co was designated M-54 instead, with BUS US-10 becoming BUS M-54 instead.
M-84	FMR	1920—1925 1925—1928	M-84 Listing
M-84	CUR	1960—Now
M-85	FMR	1919—1930 1930—1942	M-85 Listing
M-85	CUR	1956—Now
M-86	FMR	1919—1923 1923—1929 1930—1939	M-86 Listing
M-86	CUR	1940—Now
M-87	FMR	1916—1960	Former M-87 Listing
M-88	CUR	1919—Now	M-88 Listing
M-89	CUR	1919—Now	M-89 Listing
Route	Status	Extant	Description -or- Link to Route Listing
M-90	FMR	1919—1927	M-90 Listing
M-90	CUR	1927—Now
M-91	FMR	1919—1927 1927—1940	M-91 Listing
M-91	CUR	1942—Now
I-92	P/NU	1957—1958	Original desigation for I-94 between Benton Habor and Detroit as adopted by the American Association of State Highway Officals (AASHO) on the "Official Route Numbering for the National System of Interstate and Defense Highways" map issued August 14, 1957. Later changed to be part of I-94 which was originally planned to follow present-day I-196 from Benton Harbor to Grand Rapids then I-96 through Lansing to Detroit.
M-92	FMR	c1920—1962	Former M-92 Listing
M-93	CUR	1920—Now	M-93 Listing
I-94	CUR	1958—Now	I-94 Listing
I-94 BL	CUR	1960—Now	BENTON HARBOR/ST JOSEPH: BL I-94 Listing
I-94 BL	FMR	c1960—2019	KALAMAZOO: See BS I-94 Listing
I-94 BL	CUR	1960—Now	BATTLE CREEK: BL I-94 Listing
I-94 BL	CUR	1960—Now	MARSHALL: BL I-94 Listing
I-94 BL	CUR	1960—Now	ALBION: BL I-94 Listing
I-94 BL	CUR	1960—Now	JACKSON: BL I-94 Listing
I-94 BL	CUR	c1960—Now	ANN ARBOR: BL I-94 Listing
I-94 BL	CUR	c1986—Now	PORT HURON: BL I-94 Listing
I-94 BS	CUR	2019—Now	KALAMAZOO: BS I-94 Listing
I-94 CONN	FMR	1971–c1998	This route existed along what was once Shook Rd from US-25/Gratiot Ave (today's M-3) southerly and was once part of the route of M-29 when it was rerouted onto the "Mount Clemens Bypass" in 1947 until I-94 was constructed atop much of this route in the early 1960s. When I-94 opened in this area in late 1963, the portion of former M-29/Snover Rd south of Hall Rd (CONN M-59) becomes a long, one-way on-ramp to wbd I-94, while the portion between Gratiot Ave and Hall Rd maintains its two-way traffic configuration. When all of M-29 south of 23 Mile Rd was lopped off in 1971, this segment of former M-29 along Snover Rd began to be shown on internal Dept of State Highways maps as CONN I-94, likely signed as "TO I-94" from Gratiot Ave. In 1998, the on-ramp section of this route south of Hall Rd was closed when a new Hall Rd/Wm P Rosso Hwy interchange opens at I-94 just to the east. In 2002, the remainder of former Snover Rd between M-3/Gratiot Ave and M-59/Hall Rd was obliterated and replaced by Marketplace Dr just to the east.
I-94N	P/NU	1957—1958	Original desigation for I-96 between Grand Rapids and Muskegon as adopted by the American Association of State Highway Officals (AASHO) on the "Official Route Numbering for the National System of Interstate and Defense Highways" map issued August 14, 1957. Later changed to I-196 when the Detroit—Lansing—Grand Rapids—Benton Harbor route was redesignated from I-94 to I-96. This route eventually became part of mainline I-96 when the I-96 and I-196 deisngations were swapped in 1963.
M-94	CUR	1917—Now	M-94 Listing
M-95	FMR	1921—1935	M-95 Listing
M-95	CUR	1935—Now
I-96	CUR	1958—Now	I-96 Listing
I-96 BL	CUR	1962—Now	LANSING: BL I-96 Listing
I-96 BL	CUR	1962—Now	HOWELL: BL I-96 Listing
I-96 BL	FMR	1961—1977	FARMINGTON: This was the original route of US-16 through downtown Farmington, later designated BUS US-16. When I-96 replaced US-16 along this route, BUS US-16 through Farmington was designated BL I-96. Then, when the current routing of I-96 was completed in the mid-1970s and the Farmington bypass was redesignated as M-102 (now M-5), the BL I-96 designation was removed, although Grand River Ave remains as an unsigned state highway.
I-96 BL	FMR	1963—1964	SOUTH HAVEN: When I-196 was completed around South Haven in 1963, it was still designated as a part of mainline I-96. South Haven was earmarked to get an Interstate Business Connection, which would've been designated BL I-96. It is unknown if BL I-96 was signed as such, as I-96 past South Haven was redesignated as I-196 and, as such, the Business Connection at South Haven became BL I-196.
I-96 BS	FMR	c1982—2007	PORTLAND: Former BS I-96 (Portland) Listing
I-96 BS	FMR	1964—c1984	MUSKEGON: When the routings of I-96 and I-196 were swapped in early 1964, the BS I-196 routing in Muskegon was redesignated as BS I-96. The route lasted until the c1984 when it was removed, leaving the BUS US-31 designation behind.
I-96 BS	FMR	1962—1977	DETROIT: Former BS I-96 (Detroit) Listing
M-96	CUR	1927—Now	M-96 Listing
M-97	FMR	1923—1927	M-97 Listing
M-97	CUR	1927—Now
M-98	FMR	c1919—1960	Former M-98 Listing
M-99	FMR	c1920—1928 1929—1939	M-99 Listing
M-99	CUR	1940—Now
Route	Status	Extant	Description -or- Link to Route Listing
M-100	CUR	c1927—Now	M-100 Listing
M-101	FMR	c1927—1939	Former M-101 Listing
US-102	FMR	1926—1928	Historic US-102 Listing
M-102	CUR	1928—Now	M-102 Listing
M-103	FMR	1930—1931 1931—1959	M-103 Listing
M-103	CUR	1959—Now
M-104	FMR	1927—1939	M-104 Listing
M-104	CUR	1940—Now
M-105	FMR	1928—1939	Former M-105 Listing
M-106	CUR	1928—Now	M-106 Listing
M-107	FMR	1928—c1934 1935—2008	Former M-107 Listing
M-108	FMR	1928—1957 1960—2010	Former M-108 Listing
M-109	CUR	1928—Now	M-109 Listing
US-110	P/NU	1926	Under the first iteration of the US Highway system as laid out in 1926, the route which would eventually become US-112 from Detroit west-southwesterly through Ypsilanti, Saline, Jonesville, Coldwater, Sturgis, and White Pigeon and westerly was originally assigned the US-110 designation. This is because what eventually became US-12 between Detroit and Chicago (the modern-day I-94 corridor) was originally assigned the US-10 designation, thus the auxillary route was to be US-110. When the Detroit-Chicago route was designated US-12 in the final plan, US-110 was simply switched to US-112.
M-110	FMR	1927—2003	Former M-110 Listing
M-111	P/NU	C1927?	Former M-111 Listing
M-111	FMR	1928—1938 c1938–1940
M-111 SPUR	P/NU	c.1932—1934	Internal State Highway Dept maps indicate the segment of Old Kawkawlin Rd between M-111/State Park Dr and M-47/Euclid Rd northwest of Bay City was originally intended to be designated SPUR M-111 once the M-29 designation was removed in c.1932–34. Instead, Old Kawkawlin Rd from M-111 northwesterly to Kawkawlin was turned back to local control on Jan 7, 1935 and it is likely SPUR M-111 was never signed in the field.
US-112	FMR	1927—1962	Historic US-112 Listing
US-112 BUS	FMR	1956—1962	NILES: The former route of US-112 through downtown Niles. When US-12 replaced US-112 in 1961, BUS US-112 was redesignated BUS US-12.
US-112 BUS	FMR	1956—1962	YPSILANTI: In mid-1956, US-112 was transferred onto the Ypsilanti bypass routing (along with the addition of US-12) and the former route of US-112 through downtown Ypsilanti was designated BUS US-112. Upon US-112's removal from Michigan in 1961, BUS US-112 was redesignated BUS US-12.
US-112 BYP	FMR	1944—1956	YPSILANTI: As an extension to the Willow Run Expwy system constructed during World War II, BYP US-112 was completed around the south side of Ypsilanti in August 1944. It was later designated as part of the US-112 mainline, then later US-12, as it is today. In mid-1956, US-112 was transferred onto the bypass routing (along with the addition of US-12) and the former route of US-112 through Ypsilanti was designated BUS US-112.
US-112S	FMR	c1933—1935	In c.1933, the portion of US-112 leading into Indiana was apparently designated "US-112S" in anticipation of Michigan extending the mainline of US-112 westerly via Niles to US-12 at New Buffalo. The short north-south segment of the highway leading into Indiana may have been designated "US-112S" in Michigan. US-112S was never officially approved by the AASHO (today's AASHTO) and said organization noted there was contention between Michigan and Indiana over the routing of US-112. US-112S may have been a way for Indiana to keep a "branch" of US-112 in its state after Michigan's anticipated rerouting of the mainline of US-112 directly west through Niles to New Buffalo. This route later bore the designation M-205 and is now a county road named "Old M-205.".
M-112	FMR	1941—1956	Former M-112 Listing
M-113	CUR	1927—Now	M-113 Listing
M-114	FMR	1928—1962	Former M-114 Listing
M-114	P/NU	c.1965	From internal State Highway Dept maps, it appears the former route of M-14 into Ann Arbor along Plymouth Rd from M-153/Ford Rd to downtown at BUS US-23/N Main St was proposed to be retained in the state highway system and given the designation M-114. However, the part of the former M-14 along Plymouth Rd from M-153 southwesterly to Green Rd (just west of US-23) was turned back to county control the same day the new M-14 freeway was established as a state trunkline and the remainder of former M-14 along Plymouth Rd and Broadway into downtown Ann Arbor was turned back to the city a few months later, so it would appear the plans to designate this route as M-114 were never implemented.
M-115	CUR	1928—Now	M-115 Listing
M-116	CUR	1928—Now	M-116 Listing
M-117	FMR	c.1936–1938 1941—1949	M-117 Listing
M-117	CUR	1949—Now
M-118	FMR	1928—1988	See M-222 Listing
M-119	FMR	1928—1971	M-119 Listing
M-119	CUR	1979—Now
Route	Status	Extant	Description -or- Link to Route Listing
M-120	FMR	1930—c1938 1939—1961	M-120 Listing
M-120	CUR	1968—Now
M-121	FMR	1932—1935 1935—2003	M-121 Listing
M-121	CUR	2007—Now
M-122	FMR	1928—1959	Former M-122 Listing
M-123	P/NU CUR	1929—1934 1934—Now	M-123 Listing
M-124	CUR	1928—Now	M-124 Listing
M-125	FMR	1931—1936 1938—1947	M-125 Listing
M-125	CUR	1974—Now
M-126	FMR	1934—1940	Former M-126 Listing
US-127	CUR	1927—Now	US-127 Listing
US-127A	FMR	1928— post-1948	When the original US-127 Mason bypass was completed, the former route of US-127 through downtown was designated US-127A. Later, this route would be redesignated BUS US-127 and elongated.
US-127 BUS	CUR	1959—Now	JACKSON: BUS US-127 Listing
US-127 BUS	FMR	Post-1948 —1964	MASON: Originally designated US-127A and ran through downtown Mason. This route was elongated slightly when the current US-127 bypass of Mason was completed. The southern half of BUS US-127 was eventually turned back to local control, and the northern half is now part of M-36.
US-127 BUS	FMR	2002—c2005	LANSING: Former BUS US-127 Listing
US-127 BUS	CUR	2002—Now	ST JOHNS: BUS US-127 Listing
US-127 BUS	CUR	2002—Now	ITHACA: BUS US-127 Listing
US-127 BUS	CUR	2002—Now	ALMA: BUS US-127 Listing
US-127 BUS	CUR	2002—Now	ST LOUIS: BUS US-127 Listing
US-127 BUS	CUR	2002—Now	MOUNT PLEASANT: BUS US-127 Listing
US-127 BUS	CUR	2002—Now	CLARE: BUS US-127 Listing
US-127 BUS	CUR	2002—Now	HARRISON: BUS US-127 Listing
M-127	NEV	—	N/A
M-128	NEV	—	N/A
M-129	FMR	1927?—1930 1930—1935	M-129 Listing
M-129	CUR	1939—Now
M-130	FMR	1928—1955	Former M-130 Listing
M-130 EXT	FMR	1928—1959	See Former M-130 Listing for details.
US-131	CUR	1927—Now	US-131 Listing
US-131 BUS	CUR	2013—Now	CONSTANTINE: BUS US-131 Listing
US-131 BUS	CUR	1954—Now	THREE RIVERS: BUS US-131 Listing
US-131 BUS	CUR	1962—Now	KALAMAZOO: BUS US-131 Listing
US-131 BUS	FMR	1953—2017	GRAND RAPIDS: Former BUS US-131 Listing
US-131 BUS	CUR	1983—Now	BIG RAPIDS: BUS US-131 Listing
US-131 BUS	CUR	2001—Now	CADILLAC: BUS US-131 Listing
US-131 BUS	CUR	2003—Now	MANTON: BUS US-131 Listing
US-131 BYP	FMR	1944—1953	BYP US-131, a southern and eastern bypass of Grand Rapids, lasted less than a decade. In 1944, BYP US-131 was commissioned to run along the southern and eastern legs of the Grand Rapids Beltline system, with the mainline US-131 remaining through the center of the city. Then in mid-1953, the mainline designation was transferred onto the bypass, replacing the BYP US-131 designation forever. (The former US-131 through downtown was designated BUS US-131.)
US-131 STUB	FMR	1931—c1934	A likely unsigned (internal State Highway Dept) designation used on the short connector route between M-63 and US-131 southwest of LeRoy in Osceola Co. In mid-1934, this short connector was officially deisgnated M-179.
M-131	FMR	1926—1979	Former M-131 Listing
M-132	FMR	1929—1960	Former M-132 Listing
M-133	NEV	—	N/A
M-134	FMR	1928—1938	M-134 Listing
M-134	CUR	1939—Now
M-135	FMR	1928—1960	Former M-135 Listing
M-136	CUR	1931—Now	M-136 Listing
M-137	FMR	1929—2020	Former M-137 Listing
M-138	CUR	c1930—Now	M-138 Listing
M-139	CUR	1929—Now	M-139 Listing
Route	Status	Extant	Description -or- Link to Route Listing
M-140	CUR	1931—Now	M-140 Listing
US-141	CUR	1929—Now	US-141 Listing
M-141	NEV	—	N/A
M-142	FMR	1929—1938	M-142 Listing
M-142	CUR	1939—Now
M-143	FMR	1929—1930 1931—1960	M-143 Listing
M-143	CUR	1961—1989 2013—Now
M-144	P/NU	1929—1930	Former M-144 Listing
M-144	FMR	1931—1939 1940—1973
M-145	FMR	1931—1956	Former M-145 Listing
M-146	FMR	c1931—c1964	Former M-146 Listing
M-147	FMR	1931—1993	Former M-147 Listing
M-148	FMR	1932—1933	Former M-148 Listing
M-149	CUR	1930—Now	M-149 Listing
M-150	CUR	1930—Now	M-150 Listing
M-151	FMR	1931—1935 1935–1977	Former M-151 Listing
M-152	CUR	c1931—Now	M-152 Listing
M-153	CUR	1930—Now	M-153 Listing
M-154	CUR	1931—Now	M-154 Listing
M-155	UNS	1931—1987	OLD M-155 Listing
M-156	CUR	1931—Now	M-156 Listing
M-157	CUR	1931—Now	M-157 Listing
M-158	FMR	1934—1936?	In early 1934, M-9 (later M-99) was routed in southern Hillsdale Co thusly: north on Pioneer Rd, west on Burt Rd, jogging at Goose Neck Bend, north on Clark Rd, west on Montgomery Rd through Frontier, then north on Hillsdale Rd into Hillsdale. In 1934, an M-158 loop was under construction north on Pioneer Rd from Burt Rd to Montgomery Rd, then west on Montgomery back to M-9 at Frontier, effectively making it a loop from M-9. Later in 1934, it seems the routing of M-9 was transferred to the new M-158, but the M-158 routing continued to appear on official highway maps until 1936! The M-158 designation has not been re-used since.
M-159	FMR	1929?—1937	A short, 0.4-mile long spur route from then-US-2 (present-day M-129/M-48) in downtown Pickford along Main St to 125 ft east of Manila Rd. First designated on internal MSHD maps as "US-2 STUB," which was assumedly unsigned. (No evidence any of the STUB routes were ever signed in the field.) Later designated as M-159 until 1937—not clear if M-159 was signed either.
Route	Status	Extant	Description -or- Link to Route Listing
M-160 [I]	P/NU	1929—1935	The first iteration of M-160 (1929–1935) was never signed, as it was part of a temporary route for M-9 (present-day M-99) at Springport in Jackson Co. M-9 was originally proposed to bypass Springport to the east (to eliminate two New York Central RR crossings), so M-160 was to have used Main St from Green St (proposed M-9) westerly ½ mile into downtown Springport. The M-9 bypass was never built and the temporary route through Springport became the permanent one, so M-160 was never actually signed in the field.
M-160 [II]	FMR	c1941—1942	The second M-160 iteration dates to the beginning of World War II, when the State Highway Dept constructed a new roadway leading into Selfridge Field (now Selfridge Air National Guard Base) from M-29 running along the present-day line of I-94 east of Mt Clemens. The highway turned back to local control in 1942, only about a year after it was created. It was never signed in the field. (M-160 didn't have a lot of luck along those lines, did it?)
M-161	NEV	—	N/A
M-162	FMR	c1935—1939	An extremely-short highway leading from M-94 (now M-28) into the center of Au Train, in Alger Co west of Munising. Existed from c.1935-1939.
M-163	FMR	1930—1935	A short-lived route which may have never been signed in the field, M-163 consisted of the part of M-15 from US-10/Dixie Hwy (present-day US-24) northerly into downtown Clarkston. It was designated in preparation for the M-15 southerly extension from Clarkston through the remainder of Oakland Co and through Wayne Co, which was never implemented and officialy cancelled in 1935, thereby making the M-163 designation unnecessary, with it reverting back to M-15.
M-164	FMR	c1934—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-164 connected downtown Snover in Sanilac Co with M-19 east of town. This route was first designated M-195 (c.1930–c1934), but it isn't clear if it was signed as such. This spur was originally a leg of M-19 that was assumed into the trunkline system in 1913, although it's not clear how it was signed, if at all, in the early years.
M-165	FMR	1929—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-165 connected downtown Ovid in Clinton Co with M-21 south of town.
M-166	FMR	1934—1954	M-166 began as one of many very short state highway spur routes connecting a downtown district with a nearby state highway, but was extended later. In this case, M-166 originally connected downtown Lyons in Ionia Co with M-21 north of town. Later, M-166 was extended east, then south to end at US-16 (later BS I-96/Grand River Ave) in Portland. M-166 was eventually transferred to local control and the designation has not been used since.
M-167	FMR	1929—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-167 connected downtown Saranac in Ionia Co with M-21 north of town.
M-168	FMR	1931—2012	FORMER M-168 Listing
M-169	FMR	1930—1935 1940—1949 1949—1950	FORMER M-169 Listing
M-170	FMR	c1935—1937	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-170 connected downtown McMillan in Luce Co with M-28 south of town. This 0.4-mile long route ony existed for a very short time and may never have been signed in the field, as it never appeared on any Official Highway Map issued to the motoring public (only appearing on internally-issued State Highway Dept maps.)
M-171	FMR	1932—1934 1936—1960	M-171 debuted in 1932 as a loop route off US-23, beginning in northern Alcona Co, looping northwesterly through Spruce, then north and northeast to meet back with US-23 southwest of downtown Alpena. On Dec 31, 1934, that route was turned back to local control. Then on Aug 20, 1936, M-171 was rechristened along the former inland route of US-23 from Oscoda to near Spruce in Iosco and Alcona Cos. This iteration of M-171 was removed on Sept 27, 1960 and its former route received the F-41 designation in 1970. (There may have been an even earlier iteration of M-171 along Getty Ave in Muskegon for a short time prior to the Alpena Co designation.)
M-172	FMR	c1930—1937	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-172 connected downtown Middleville in Barry Co with M-37 on the east side of town. This was when M-37 entered the area via State Rd and E Main St, then turned northerly to leave town via Grand Rapids St and Whitneyville Rd. M-172 ran along Main St from Grand Rapids St westerly into the downtown district.
M-173 [I]	FMR	c1929—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-173 connected downtown Orleans in Ionia Co with M-44 north of town in the mid-1930s. Unclear if it was ever signed in the field.
M-173 [II]	FMR	1939—1972	M-173 was the last of four route designations to be applied to the route through downtown Menominee from the Ann Arbor Railroad ferry docks to US-41. This fourth designation—replacing the M-35 routing through downtown—existed from 1931 to 1972 and was likely removed after the carferry stopped running from Elberta to Menominee. Addition to trunkline system approved by State Administrative Board on June 19, 1931. Initially designated on internal State Hwy Dept maps as "US-41 STUB" and then as M-180 and then part of M-35 until the M-173 designation was transferred to it after the cancellation of the Orleans spur.
M-174 [I]	FMR	1930—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-174 connected downtown Buchanan in Berrien Co with M-60 at first and then later US-112 (now US-12) south of town.
M-174 [II]	FMR	1939—1972	Originally designated M-120, the portion of Logan St (now M L King Jr Blvd) in Lansing from Grand River Ave to the Ingham/Clinton Co line was designated M-174 in 1939. It was turned back to local control in 1972.
M-175	FMR	1931—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-175 connected downtown Galien in Berrien Co with M-60 at first and then US-112 (now US-12) south of town. Addition to trunkline system approved by State Administrative Board on June 19, 1931.
M-176	FMR	1931—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-176 connected downtown Durand in Shiawassee Co with M-71 north of town.
M-177	FMR	1936—1939	M-177 replaced the M-46 designation along Michigan Ave from US-27/M-46 in downtown St Louis to US-27A (later BUS US-27, now BUS US-127) just east of downtown Alma in late 1936. M-177 lasted until late-1939.
M-178	FMR	1928—1941	FORMER M-178 Listing
M-179	FMR	1934—1958	M-179 Listing
M-179	CUR	1998—Now
Route	Status	Extant	Description -or- Link to Route Listing
M-180	FMR	1933—1935	M-180 was the second of four route designations to be applied to the route through downtown Menominee from the Ann Arbor Railroad ferry docks to US-41. The M-180 designation existed from 1933 to mid-1935 and was replaced by the M-35 designation.
M-181	FMR	1933—1955	M-181 began as a short spur route leading into downtown Metamora from M-24 in Lapeer Co in 1933, but was extended to M-53 north of Almont in late-1935. M-181 was turned back to local control in mid-1955 and the designation has not been used since.
M-182	FMR	1932—1940s?	Wilson Ave in Grandville between M-21/Chicago Dr and M-114/28th St was a state trunkline route from late 1932 until late 1970. On some internal MSHD maps and documents, it was labeled as "M-132," but another M-132 already existed between Ann Arbor and Dexter, so that is clearly an error. However, one 1937 Bureau of Public Roads map shows an "M-182" symbol on a detailed set of Michigan transportation maps. Thus, at present, it is assumed the MSHD maps simply mis-labeled their maps with a "3" instead of an "8". This short connector is likely never signed with its own route number in the field and, if it was, it was only for a short time in the 1930s and was likely signed as "TO M-21" and "TO M-114" (or "TO [the other beltline routes]". The 1957 State Highway Dept Control Section Atlas, which very clearly labels every trunkline segment with its route designation, explicitly shows this segment of Wilson Ave as "part of 41041," which which was the Control Section number for M-21/Chicago Dr in Grandville from Kenowa Ave to 28th St. So, at least in the mid-1950s as far as the State Highway Dept was concerned, M-21 was a "three-legged" route at Grandville.
M-183	FMR	1933—1960	M-183 Listing
M-183	CUR	1985—Now
M-184	FMR	1933—1939	M-184 debuted in 1933 beginning at M-89 east of Richland continuing along 40th St and C Ave to the Kellogg Bird Sanctuary (now the Kellogg Biological Station). It was cancelled in 1939.
M-185	CUR	1933—Now	M-185 Listing
M-186	FMR	1932—1939	M-186 Listing
M-186	CUR	1940—Now
M-187	NEV	—	N/A
M-188	CUR	1932—Now	M-188 Listing
M-189	CUR	1932—Now	M-189 Listing
M-190	NEV	—	N/A
M-191	FMR	1932—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-191 connected downtown Fenwick in Montcalm Co with M-14 east of town.
M-192	FMR	1932—1936	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-192 connected downtown Bancroft in Shiawassee Co with M-78 north of town.
M-193	FMR	1932—1936	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-193 connected downtown Morrice in Shiawassee Co with M-78 north of town.
I-194	CUR	1961—Now	I-194 Listing
M-194	FMR	1933—1937	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-194 connected downtown New Lothrup in Shiawassee Co with M-13 east of town. (Authorized by State Administrative Board, November 1, 1931. Cancellation approved by MSHD Highway Advisory Board December 17, 1937 and officially cancelled on December 29.)
M-195	FMR	c1930—1933? 1933–1937	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, the first M-195 connected Snover with M-19 in west-central Sanliac Co. Later, M-195 connected Henderson in Shiawassee Co with M-52 east of town. (Second iteration suthorized by State Administrative Board, November 1, 1931. Cancellation approved by MSHD Highway Advisory Board December 17, 1937 and officially cancelled on December 29.)
I-196	CUR	1960—Now	I-196 Listing
I-196 BL	CUR	1964—Now	SOUTH HAVEN: BL I-196 Listing
I-196 BL	CUR	1974—Now	HOLLAND/ZEELAND: BL I-196 Listing
I-196 BL	P/NU	c.1960	GRAND RAPIDS: The proposed designation for what had been designated BUS US-16 between downtown Grand Rapids and Marne, northwest of Grand Rapids, following N Division Ave, Leonard St, Remembrance Rd and Ironwood Dr. This was when I-196 followed what is now I-96 from Grand Rapids to Muskegon and I-96 utilized the present-day I-196 route via Holland to Benton Harbor.
I-196 BS	CUR	1973—Now	WYOMING:BS I-196 Listing
I-196 BS	FMR	1962—1964	MUSKEGON: When I-196 was completed to US-31 near Muskegon, the BS I-196 designation was added to BUS US-31 leading from the end of I-196 to downtown Muskegon. When the routings of I-96 and I-196 were swapped in early 1964, the BS I-196 routing in Muskegon was redesignated as BS I-96.
M-196	FMR	c.1933—1941 or c.1954	Former M-196 Listing
M-197	NEV	—	N/A
M-198	FMR	1933—1938	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-198 connected downtown Lakeview in Montcalm Co with M-46 south of town.
M-199	FMR	1933—1939	M-199 Listing
M-199	CUR	1998—Now
Route	Status	Extant	Description -or- Link to Route Listing
M-200	FMR	1933—1939	One of many very short state highway spur routes around the state, usually connecting a downtown district with a nearby state highway bypassing the center of the city. In this case, M-200 connected downtown Stephenson in Menominee Co with US-41 on the east side of town.
M-201	CUR	1948—Now	M-201 Listing
M-202	NEV	—	N/A
M-203	CUR	1933—Now	M-203 Listing
M-204	CUR	1933—Now	M-204 Listing
M-205	FMR	1935—2002	FORMER M-205 Listing
M-206	FMR	c1933—1940	FORMER M-206 Listing
M-207	NEV	—	N/A
M-208	FMR	1935–1939	FORMER M-208 Listing
M-209	FMR	1932?—1995	FORMER M-209 Listing
M-210	FMR	1933—1938	FORMER M-210 Listing
M-211	CUR	1934—Now	M-211 Listing
M-212	CUR	1931—Now	M-212 Listing
M-213 [I]	FMR	1935—1960	The first M-213 was a 14-mile highway running along present-day B-35 from M-46 east of Muskegon to M-20 (now M-120) at Brunswick, east of Holton established in January 1935. It was turned back to local control in January 1960.
M-213 [II]	FMR	c1960—1971	The second M-213 was immediately christenend along what had been M-20 from US-31 (now Whitehall Rd) in North Muskegon to Muskegon State Park. This North Muskegon-to-Muskegon State Park route survived until September 1971 when it was turned back to local control.
M-214	FMR	1935—1953	M-214 dated to early-1935 when the former M-79 route from west of Nashville to downtown Vermontville was re-designated M-214. (At this time, M-66 through Ionia Co was designated M-14.) The highway was later scaled back from Vermontville to end in downtown Nashville, serving as a 3-mile connector route along today's M-79 from M-79 west of Nashville to M-14 in Nashville. M-214 survived M-14's redesignation as M-66 in 1941 by about a decade, until it was supplanted by a rerouting of M-79 in 1953.
M-215	FMR	1935—1957	M-215 was a 7-mile route running from US-12 in Lawrence to M-43 just east of Bangor in Van Buren Co. The M-215 route markers may have been removed from the route as early as late-1953 or early-1954, but the highway itseld was turned back to local control (becoming Co Rd 215) in mid-1957.
M-216	CUR	1935—Now	M-216 Listing
M-217	CUR	2002—Now	M-217 Listing
M-218	FMR	1935—1963	Originally, M-218 began at US-16 (now Grand River Ave) in "West Novi" (part of the present City of Wixom), running north along Wixom Rd to Wixom, east on Fourteen Mile Rd (now Pontiac Trail) to Walled Lake, then northeasterly on Walled Lake Rd (now also Pontiac Trail) via Orchard Lake and Keego Harbor, ending at M-58 (later US-10, now US-24) southwest of downtown Pontiac. In 1937, M-218 was extended into downtown Pontiac. On the final day of 1963, the entire route was transferred to local control. Extensions of M-218 southwesterly through South Lyon to US-12 at Chelsea and northeasterly via Utica to US-25 at Richmond were proposed in the 1930s, but never built. These extensions would have turned M-218 into a de facto Detroit bypass route.
M-219	FMR	1936—1966	M-219 was one of several highways whose sole purpose was to connect the various railroad and carferry docks with the state highway system. Others were located in Menominee, St Ignace, Elberta, Ludington, Muskegon, etc. Commissioned in 1936, M-219 lasted until 1966 as the Ann Arbor Railroad slowly decreased the number of ferry sailings from Elberta to Manistique, ending the service in 1967.
M-220	NEV	—	N/A
M-221	CUR	1945—Now	M-221 Lisitng
M-222	CUR	1988—Now	M-222 Listing
US-223	CUR	1930—Now	US-223 Listing
US-223 BUS	CUR	1942—Now	BUS US-223 Listing
M-223	NEV	—	N/A
M-224	NEV	—	N/A
M-225	NEV	—	N/A
M-226	NEV	—	N/A
M-227	CUR	1998—Now	M-227 Listing
M-228	NEV	—	N/A
M-229	NEV	—	N/A
Route	Status	Extant	Description -or- Link to Route Listing
For route designations from "230" and higher, only those routes which currently exist, previously existed, or will exist in the near future are listed. For any designation from "230" and higher where no listing is indicated, it can be assumed no such designation has ever existed in Michigan
M-231	CUR	2015—Now	M-231 Listing
M-239	CUR	1963—Now	M-239 Listing
M-247	CUR	1960—Now	M-247 Listing
I-275	CUR	1968—Now	I-275 Listing
M-275	P/NI	1970s—1986	I-275 Listing
M-294	CUR	1998—Now	M-294 Listing
I-296	UNS	1962—Now	I-296 Listing
M-311	CUR	1998—Now	M-311 Listing
M-331	FMR	1998—2019	FORMER M-331 Listing
M-343	CUR	2019—Now	M-343 Listing
I-375	CUR	1964—2027	I-375 Listing
I-375 BS	UNS	?—Now	BS I-375 Listing
I-475	CUR	1970—Now	I-475 Listing
I-496	CUR	1963—Now	I-496 Listing
I-496 BS	FMR	1962—1966	A BS I-496 designation is suggested in the "Lansing Area Trunkline Plan" issued by the Michigan State Highway Dept in September 1961 to connect the temporary terminus of I-496 at present-day Exit 6 (north jct I-496 & US-127) with I-96 northwest of the city. BS I-496 would have followed the Homer-Howard one-way pair northerly from I-496 to M-43/BUS M-78 on the Saginaw-Sheridan one-way pair (present-day Saginaw-Oakland Sts), then westerly to US-27/Cedar-Larch Sts, northerly to North St, westerly to W Grand River Ave, then northwesterly out of Lansing back to the proposed I-96 at present-day Exit 90. The designation was never used, to that extent, however, although it appears that BS I-496 may have been the designation assigned to the Homer–Howard one-way pair from I-496 northerly to Grand River Ave from 1962–1966 when US-127 took over.
I-496 CL	FMR	1989—2024	FORMER CAPITOL LOOP Listing
M-553	CUR	1998—Now	M-553 Listing
M-554	FMR	1998—2005	FORMER M-554 Listing
I-675	CUR	1969—Now	I-675 Listing
I-696	CUR	1963—Now	I-696 Listing
I-696 BS	FMR	1962—1970	The completed portion of the John C Lodge Expwy was given the BS I-696 designation in c.1961-62, even before the actual I-696 was completed and open to traffic! In 1963, the rest of the Lodge Frwy was completed out to the newly-completed I-696 in Southfield, and the entire Lodge Frwy/Northwestern Hwy freeway was designated BS I-696. BS I-696 was replaced by US-10 in 1970.
Route	Status	Extant	Description -or- Link to Route Listing
M-700	UNS	2013—Now	BELLE ISLE ROADS Listing
M-701	UNS	2013—Now	BELLE ISLE ROADS Listing
M-702	UNS	2013—Now	BELLE ISLE ROADS Listing
M-703	UNS	2013—Now	BELLE ISLE ROADS Listing
M-704	UNS	2013—Now	BELLE ISLE ROADS Listing
M-705	UNS	2013—Now	BELLE ISLE ROADS Listing
M-706	UNS	2013—Now	BELLE ISLE ROADS Listing
M-707	UNS	2013—Now	BELLE ISLE ROADS Listing
M-708	UNS	2013—Now	BELLE ISLE ROADS Listing
M-709	UNS	2013—Now	BELLE ISLE ROADS Listing
M-710	UNS	2013—Now	BELLE ISLE ROADS Listing
M-711	UNS	2013—Now	BELLE ISLE ROADS Listing
M-712	UNS	2013—Now	BELLE ISLE ROADS Listing
Route	Status	Extant	Description -or- Link to Route Listing
BELLE ISLE ROADS	UNS	2013—Now	BELLE ISLE ROADS Listing
CAPITOL LOOP	FMR	1989—2024	FORMER CAPITOL LOOP Listing (aka I-496 CL)
JOHN C LODGE FRWY	CUR	1945—Now	No route designation 1945–1962, BS I-696 from 1962–1970, US-10 from 1970–1986, and M-10 from 1986–Present. For details, see JOHN C LODGE FRWY Listing (under construction), US-10 Route Listing, and/or M-10 Route Listing.
NORTH– WESTERN HWY	FMR	1958—1959	Once proposed as a radial highway or freeway extending Detroit's John C Lodge Frwy northwesterly across Oakland Co to meet up with the Fenton-Clio Expwy (present-day US-23) at Fenton, potentially as the primary route from Detroit to Flint, Saginaw and on toward the Straits of Mackinac before the genesis of I-75 through Detroit's northern suburbs via Pontiac and on to Flint. Built as a divided highway as far as Orchard Lake Rd in central Oakland Co, a freeway extension was proposed for many years to meet with the proposed I-275 (and later M-275) freeway, while the remainder of the proposed highway to Fenton was cancelled. It wasn't until the 21st Century that the last plans for a Northwestern Highway Extension finally seemed to be finally killed off for good.
WIARD RD	FMR	1958—1959	After the US-12 designation is removed from the Wiard Rd segment of the Willow Run Expressway system (the north-south segment between present-day US-12 and I-94 east of Ypsilanti) with the opening of the "Willow Run Bypass" (present-day I-94 between present-day US-12 and Wiard Rd) in October 1958), Wiard Rd itself remains an unsigned state trunkline for a time until it is transferred to county control June 28, 1959. During that time, Wiard Rd did not have a route designation and it is unclear if any other internal MSHD "designation" was used to refer to it other than it's acutal road name of Wiard Rd, thus it is being listed here as such for this time period prior to its cancellation as a trunkline.
Route	Status	Extant	Description -or- Link to Route Listing
TO I-75	FMR	1963—1969 1969—1971	This "TO I-75" designation existed in Metro Detroit while I-75 was being constructed through the city. In the field, this route was posted with "TO I-75" route marker assemblies as opposed to simply posting "I-75" markers alone or as a "TEMP I-75" routing. The first "TO I-75" routing at Detroit began at the current US-24 CONNECTOR in Taylor, continuing north on US-24/Telegraph Rd to M-102/Eight Mile Rd, then east on M-102 to Stephenson Hwy, turning north on Stephenson (formerly M-150) to 11 Mile Rd, where a completed segment of I-75 picked back up. The second routing began at the I-75 & M-39/Southfield Rd interchange at Lincoln Park, continuing north on M-39/Southfield Rd & Frwy to M-102/Eight Mile Rd, then east on M-102 to I-75. A disconnected part of "TO I-75" existed between 9 Mile and 11 Mile Rds. The M-39/M-102 portion of "TO I-75" was "decommissioned" in 1969, with the short 9 Mile-to-11 Mile Rd section remaining until 1971.
TO I-75	FMR	1962—1973	This "TO I-75" designation existed in Central Michigan while I-75 was being constructed from Bay City to Grayling. In the field, this route was posted with "TO I-75" route marker assemblies as opposed to simply posting "I-75" markers alone or as a "TEMP I-75" routing "TO I-75" began at the jct of US-10, US-23 & M-25 west of Bay City, continued westerly along US-10 to Clare, then northerly along US-27 from Clare to the completed portion of I-75 south of Grayling. "TO I-75" lasted until I-75 was completed along its present route in 1973.
TO I-75	FMR	c1961—1962	This "TO I-75" designation existed in Northern Michigan while I-75 was being constructed from Gaylord to Indian River. In the field, this route was posted with "TO I-75" route marker assemblies as opposed to simply posting "I-75" markers alone or as a "TEMP I-75" routing According to the Official Michigan Highway Map and internal State Highway Dept Control Section Atlases, "TO I-75" began in 1961 along what had been US-27 from Gaylord to just north of Indian River near Topinabee, lasting only about a year when I-75 was completed along the stretch in the Fall of 1962.
TO I-94	FMR	?—1966	The "TO I-94" designation existed in Metro Detroit while I-94 was being constructed in southeastern Macomb Co. In the field, this route was posted with "TO I-94" route marker assemblies as opposed to simply posting "I-94" markers alone or as a "TEMP I-94" routing "TO I-94" began at the end of I-94 at M-102/Vernier Rd in Harper Woods, continuing west on M-120 to US-25/Gratiot Ave, then north on US-25/Gratiot Ave to Metropolitan Pkwy, then easterly back to a completed segment of I-94. In 1964, "TO I-94" was moved from Metropolitan Pkwy south to 14 Mile Rd. In 1966, when I-94 was completed through southeastern Macomb Co, the "TO I-94" designation was removed.
TO I-196	FMR	1967—1974	The "TO I-196" designation existed in Allegan and Ottawa Cos while I-196 was being constructed between Holland and Grand Rapids. In the field, it is assumed this route was posted with "TO I-196" route marker assemblies as opposed to simply posting "I-196" markers alone or as a "TEMP I-196" routing. This route was shown on internal Dept of State Highways "Control Section Atlases" which tend to be quite accurate and thorough as to route designations, although "TO I-196" was never shown on the official highway map, unlike the other "TO" route designations. "TO I-196" began at the north end of completed I-196 south of Holland and continued northerly along US-31 to the M-21 interchange east of downtown, then followed M-21 around the south side of Zeeland and then northeasterly through Hudsonville, terminating at the end of the completed freeway at the Ottawa/Kent Co line between Jenison and downtown Grandville. "TO I-196" was removed when the I-196 freeway was completed in 1974.
Intercounty Highway Routes
Route	Status	Extant	Description -or- Link to Route Listing
A-2	CUR	1970—Now	A-2 Listing
A-37	CUR	1978—Now	A-37 Listing
A-42	CUR	1983—Now	A-42 Listing
A-45	CUR	1973—Now	A-45 Listing
B-1	FMR	1970—1971	The original designation for H-40 in the Upper Peninsula from 1970. During the pilot year for the Intercounty Highway System program, A-2 in Allegan Co and B-1 in Mackinac and Chippewa Cos were designated, signifying the original intent was to have "A" routes in the Lower Peninsula and "B" routes in the U.P. When additional routes were added in 1971, the current eight-zone configuration was implemented and B-1 became H-40. It is assumed B-1 was fully signed in the field during its one year of existence.
B-15	CUR	1971—Now	B-15 Listing
B-23	CUR	1971—Now	B-23 Listing
B-31	CUR	1971—Now	B-31 Listing
B-35	CUR	1971—Now	B-35 Listing
B-72	CUR	1971—Now	B-72 Listing
B-86	CUR	1971—Now	B-86 Listing
B-88	FMR	1985—1998	Connected M-37 at White Cloud with US-131 at Stanwood. Was completely assumed into the route of M-20 when the route of B-88 was transferred to state control from Mecosta and Newaygo Cos in 1998 as part of the short-lived "Rationalization" program.
B-96	CUR	1985—Now	B-96 Listing
C-38	CUR	1971—Now	C-38 Listing
C-42	CUR	1971—Now	C-42 Listing
C-48	CUR	1971—Now	C-48 Listing
C-56	CUR	1973—Now	C-56 Listing
C-58	CUR	1985—Now	C-58 Listing
C-64	CUR	1971—Now	C-64 Listing
C-65	CUR	1973—Now	C-65 Listing
C-66	CUR	1971—Now	C-66 Listing
C-71	CUR	1973—Now	C-71 Listing
C-73	CUR	1973—Now	C-73 Listing
C-77	CUR	1971—Now	C-77 Listing
C-81	CUR	1971—Now 1980—Now	C-81 Listing (North & South Segments)
Route	Status	Extant	Description -or- Link to Route Listing
D-19	CUR	1971—Now	D-19 Listing
D-32	CUR	1971—Now	D-32 Listing
F-01	CUR	1971—Now	F-01 Listing
F-05	CUR	1971—Now	F-05 Listing
F-7	UNS	c1977—?	One of the "Ogemaw routes" which may have never been signed in the field and was likely never "officially" recognized by MDOT.
F-9	UNS	c1977—?	One of the "Ogemaw routes" which may have never been signed in the field and was likely never "officially" recognized by MDOT. Ran along Old M-76 southeast of West Branch.
F-17	UNS	c1977—?	One of the "Ogemaw routes" which may have never been signed in the field and was likely never "officially" recognized by MDOT.
F-18	CUR	c1979—Now	F-18 Listing (One of the "Ogemaw routes")
F-19	CUR	c1977—Now	F-19 Listing (One of the "Ogemaw routes")
F-20	FMR	c1977—c1985	One of the "Ogemaw routes" which may have been once signed in the field and featured on the state official transportation map but were removed from the map in the 1980s and seems to no longer be "officially" recognized by MDOT. Portion in Iosco Co was assumedly signed while it was depicted on the official transportation map, but became a "former" route in that county.
F-21 [S]	UNS	c1977—?	One of the "Ogemaw routes" which may have never been signed in the field and was likely never "officially" recognized by MDOT.
F-21 [N]	CUR	1985—Now	F-21 Listing
F-24	UNS	c1977—?	One of the "Ogemaw routes" which may have never been signed in the field and was likely never "officially" recognized by MDOT.
F-26	CUR	c1977—Now	F-26 Listing (One of the "Ogemaw routes")
F-28	CUR	1978—Now	F-28 Listing (One of the "Ogemaw routes")
F-30	CUR	1974—Now	F-30 Listing
F-32	CUR	1983—Now	F-32 Listing
F-38	CUR	1971—Now	F-38 Listing
F-41	CUR	1974—Now	F-41 Listing
F-42	CUR	1971—Now	F-42 Listing
F-44	CUR	1971—Now	F-44 Listing
F-97	CUR	1972—Now	F-97 Listing
G-08	CUR	1971—Now	G-08 Listing
G-12	CUR	1971—Now	G-12 Listing
G-18	CUR	1973—Now	G-18 Listing
G-30	FMR	1973—1991	See M-69 Route Listing
G-38	FMR	1973—c1994?	Former G-38 Listing
G-67	FMR	1973—c2002?	Former G-67 Listing
G-69	CUR	1973—Now	G-69 Listing
H-01 [S]	CUR	1973—Now	H-01 [South Portion] Listing
H-01 [N]	CUR	1973—Now	H-01 [North Portion] Listing
H-03	CUR	1973—Now	H-03 Listing
H-05	CUR	1973—Now	H-05 Listing
H-09	UNS	1973?—?	H-09 Listing
H-11	CUR	c2004—Now	H-11 Listing
H-13	CUR	1973—Now	H-13 Listing
H-15	CUR	1973—Now	H-15 Listing
Route	Status	Extant	Description -or- Link to Route Listing
"H-16"	NEV	NEVER	"H-16" Listing
H-33	CUR	1971—Now	H-33 Listing
H-37	CUR	1971—Now	H-37 Listing
H-40	CUR	1971—Now	H-40 Listing
H-42	CUR	1971—Now	H-42 Listing
H-44 [W]	CUR	1973—Now	H-44 [West Portion] Listing
H-44 [E]	CUR	1971—Now	H-44 [East Portion] Listing
H-52	CUR	1973—Now	H-52 Listing
H-57	CUR	1971—Now	H-57 Listing
H-58	CUR	1971—Now	H-58 Listing
H-60	UNS	1973?—?	H-60 Listing
H-63	CUR	1971—Now	H-63 Listing
OLD-27	CUR	c1971—Now	OLD-27 Listing
OLD-76	CUR	c1983—Now	OLD-76 Listing
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