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.
State Trunklines are the other state highways maintained by MDOT. These highways are completely owned and maintained by the state. Michigan highways are properly referred to using the M and never as "Route 28" or "Highway 115", but as M-28 or M-115. The marker used for state trunklines is a diamond with a block-letter "M" at the top. Roads that are maintained by the state but not assigned a state trunkline designation carry an unsigned highway designation.
County-Designated Highways are assigned numbers in a zone system by MDOT, but maintained by the counties. Each zone is indicated by a letter A–H which is followed by a number based on a grid inside that zone. Each county also maintains any other roadway that is not a state trunkline or a city street. The numbering and signing practices vary from county to county, as does the size of each county's system. Numerical designations typically do not carry over from one county to the next; a CDH that crosses county lines keeps its designation in each county however. County road designations are typically abbreviated "CR" or "Co Rd" followed by the number, and CDHs are abbreviated to just their letter and number assignment.
Recognized content - 
The Pierce Stocking Scenic Drive is a scenic route within Sleeping Bear Dunes National Lakeshore, in western Northern Michigan in the United States. The roadway, with its "scenic vistas and gentle curves", is located off state highway M-109 between Empire and Glen Arbor. It runs for 7.4 miles (11.9 km) through forest and dunes areas, providing access to scenic overlooks of the Lake Michigan shoreline and the surrounding park land. Interpretive markers along the roadway are keyed to the National Park Service's printed guide to the drive. Over 80,000 vehicles make the trip, in addition to bicyclists, hikers and skiers who use the road each year.
The road was built in the 1960s and finished in 1967 by Pierce Stocking. A lumberman with road-building experience, he wanted to share the beauty of the area with others. He operated the facility until his death in 1976; afterwards it was purchased by the National Park Service and added to the park. In the 1980s, a two-year program reconstructed the roadway and added a number of features for visiting tourists. In 2011, the morning show Good Morning America named the Sleeping Bear Dunes, and Pierce Stocking Drive, as the "Most Beautiful Place in America" after a viewer poll on its website; publicity since the award has increased traffic along the roadway. (Full article...)General images
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A-2 in Allegan County south of Holland -
M-87 on November 1, 1956 -
M-39 bridge over the River Rouge in Dearborn -
Welcome sign along US 8 -
Milemarker used in 1922 for M-14 -
Map of the zone system -
Planning map for the Detroit area freeways from 1955 -
Exit 254 on I-75 south of Grayling -
Junction between M-28 and M-178 south of Munising before 1941 -
M-121 in Jenison -
Interstate HighwaysOther freewaysMiscellaneous expressways -
Grand River Avenue, once a part of M-16 and later US 16, was originally an Indian trail converted as a plank road before becoming a state highway. -
Map of the pre-statehood Indian trails -
Construction along I-96 for the interchange with M-231 in July 2013 (from Michigan State Trunkline Highway System) -
H-58 west of Grand Marais -
M-553 approaching Glass' Curve south of Marquette -
Dead Man's Curve along the Marquette–Negaunee Road shown in 1917 with its hand-painted centerline, the first in the nation -
H-13 during winter
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Topics
State Trunkline System, overview of the system
- Interstates Highways in the state
- US Highways in the state
- State Trunklines
- County-Designated Highways in the state
- Pure Michigan Byways, a system of scenic, historical or recreational highways in the state
- Great Lakes Circle Tour
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