Portal:Michigan highways
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Portal:Michigan highways
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Portals → Technology → Transport → Roads → U.S. Roads → Michigan Highways
Michigan Highways
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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.
Selected article
H-33 is a county-designated highway in the Upper Peninsula between Gould City and McMillan that was previously M-135, a former state trunkline highway. The roadway follows Manistique Lakes Road from Gould City at a junction with US 2 near Lake Michigan north to M-28 near McMillan. The northern section of the highway is also called County Road 135 (CR 135) in Luce County. From 1929 until 1960, the road was part of the state highway system as M-135. The northern end of the highway always contained a section that ran concurrently with M-98, another state highway in the area. For a period in the 1950s, M-135 had a different northern terminus separate from M-98's endpoint. A few years before both highways were removed from the highway system, M-135 was moved to use M-98's terminus with M-28. Since the 1970s, M-135 has been a part of the county-designated highway system and assigned the number H-33, a moniker it has borne since. (more...)
Recently selected: M-17 • M-183 • I-94
Did you know...
- ... that the Seney Stretch (pictured) along M-28 is 25 miles (40 km) of "straight as an arrow highway" commonly called the most boring highway in the state?
- ... that the route of M-47 was previously part of US 10?
- ... that a section of the former Bus. M-28 in Newberry has also carried the designations M-28, M-48, M-117 or M-123 at different times in its history?
- ... that the Leelanau Scenic Heritage Route forks to follow M-22 and M-109 through the Sleeping Bear Dunes National Lakeshore?
- ... that M-67, a state highway in the Upper Peninsula of Michigan, has remained essentially unchanged but the highways connecting to it have changed three times since 1919?
Categories
▼ Roads in Michigan
► Lists of roads in Michigan
► County roads in Michigan
► Freeways and expressways in Michigan
► Great Lakes Circle Tours
► Scenic highways in Michigan
► Historic trails and roads in Michigan
► Road incident deaths in Michigan
► State highways in Michigan
► Streets in Michigan
Selected picture
M-1 (Woodward Avenue) and Lincoln Street in Birmingham during the Woodward Dream Cruise showing a replica Batmobile
Recently selected: M-28/M-178 • M-1 • US 41/M-28
Topics
State Trunkline System, overview of the system
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Related portals
Michigan | Metro Detroit | Cars | Roads | U.S. Roads |
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Canada Roads | California Roads | Maryland Roads | New York Roads | Washington Roads |
WikiProjects
U.S. Roads WikiProject- Michigan State Highways Task Force
Michigan WikiProject- Detroit Task Force
Things to do
Nominations and votes for selected articles and selected pictures are always needed. Anyone can nominate an article, and anyone can vote for an article. You can also recommend items for Did you know?. Improvements to the articles are always welcome as the project works on expanding and nominating the remaining ones for Good Article or Featured Article status.
Categories:
- Road portals
- Michigan portals
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