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TheState Trunkline Highway System of the US state ofMichigan is a network of roads owned and maintained by theMichigan 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 andUS 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 alongMexico and theGulf of Mexico), and odd-numbered highways are north–south highways (with the lowest numbers along thePacific Ocean). US Highways are also numbered in a grid—even numbered for east–west highways (with the lowest numbers alongCanada) and odd numbered for north–south highways (with the lowest numbers along theAtlantic 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) andUS 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 anunsigned 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.
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M-35 is astate trunkline highway in theUpper Peninsula (UP) of the US state ofMichigan. It runs for 128 miles (206 km) in a general north–south direction and connects the cities ofMenominee,Escanaba, andNegaunee. The southern section of M-35 inMenominee andDelta counties carries two additional designations; M-35 forms a segment of theLake Michigan Circle Tour, and it is the UP Hidden Coast Recreational Heritage Trail, which is a part of what is now called thePure Michigan Byways Program. Along the southern section, the highway is the closest trunkline to theGreen Bay, a section ofLake Michigan. The northern section of the highway turns inland through sylvan areas of the UP, connecting rural portions of Delta andMarquette counties.
M-35 is an original state trunkline that was first signposted in 1919, that was intended to run from Menominee in the south to nearBig Bay in the north, before it was to turn towardL'Anse to end atOntonagon. However, the section through theHuron Mountains in northern Marquette andBaraga counties was never built. Automobile pioneerHenry Ford helped halt this construction to gain favor with and membership into the exclusiveHuron Mountain Club. Some discontinuous sections were later ceded to local control. The northern segment of the route between Ontonagon andBaraga was retained as a discontinuous segment of the highway; this northern segment was later redesignated asM-38, another state trunkline. The northern end was later rerouted out of the City of Negaunee intoNegaunee Township to avoid mining activity nearPalmer. (Full article...)
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State Trunkline System, overview of the system
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