Portal:Michigan highways
Michigan Highways
The State Trunkline Highway System of the US state of Michigan is a network of roads owned and maintained by the Michigan Department of Transportation (MDOT). The most prominent of these roads are part of one of three numbered highway systems in Michigan: Interstates Highways, US Highways, and the other State Trunklines. Other systems of roads are operated by the 83 counties in the state as well as each city.
Interstate Highways and US Highways are assigned at the national level. Interstate Highways are numbered in a grid—even-numbered highways are east–west highways (with the lowest numbers along Mexico and the Gulf of Mexico), and odd-numbered highways are north–south highways (with the lowest numbers along the Pacific Ocean). US Highways are also numbered in a grid—even numbered for east–west highways (with the lowest numbers along Canada) and odd numbered for north–south highways (with the lowest numbers along the Atlantic Ocean). For this reason, mainline (two-digit) Interstate Highways in Michigan all have numbers above 69 and mainline US Highways all have numbers below 45. Three-digit Interstate and U.S. Highways, also known as "child routes," are branches off their main one- or two-digit "parents". The Interstate and US Highways are maintained by MDOT. Interstate 75 (I-75) and US Highway 23 (US 23) are the longest examples in the state.
General images
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Milemarker used in 1922 for M-14
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Welcome sign along US 8
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M-39 bridge over the River Rouge in Dearborn
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Planning map for the Detroit area freeways from 1955
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H-58 west of Grand Marais
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M-87 on November 1, 1956
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Exit 254 on I-75 south of Grayling
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A-2 in Allegan County south of Holland
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US 16, was originally an Indian trail converted as a plank road before becoming a state highway.Grand River Avenue, once a part of M-16 and later
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H-13 during winter
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Map of the zone system
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Dead Man's Curve along the Marquette–Negaunee Road shown in 1917 with its hand-painted centerline, the first in the nation
- M-121 in
- M-553 approaching Glass' Curve south of
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Interstate HighwaysOther freewaysMiscellaneous expressways
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Junction between M-28 and M-178 south of Munising before 1941
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Map of the pre-statehood Indian trails
- Construction along I-96 for the interchange with M-231 in July 2013 (from
Selected picture
Topics
State Trunkline System, overview of the system
- Interstates Highways in the state
- US Highways in the state
- State Trunklines
- County-Designated Highwaysin the state
- Pure Michigan Byways, a system of scenic, historical or recreational highways in the state
- Great Lakes Circle Tour
Subcategories
Related portals
WikiProjects
- U.S. Roads WikiProject
- Michigan State Highways Task Force
- Michigan WikiProject
Things to do
Nominations and votes for