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Introduction
Michigan's Trunklines
Michigan's Route Markers
Master List 1918-Present
Historical Overview
History of Mich. Roads
Maps
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Photos
Related Links
Highway Listings
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
230-249
250-696
Bus. 2-31
Bus. 32-94
Bus. 96-496
County Highways
A-2—C-81
D-19—H-15
H-16—H-63
Other Highways
Unsigned St. Trunklines
Great Lakes Circle Tours
Forest Highways
Heritage Routes
Polar-Equator Trail
In Depth: News & Articles
Memorial Highways
M-35 & Henry Ford
National Highway System
Historic Auto Trails
Zilwaukee Bridge
Michigan Left
US-31 in Berrien County
US-31 in Ottawa County
more...
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M-21 Route Map
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