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.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/93/I-75.svg/40px-I-75.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/US_23.svg/40px-US_23.svg.png)
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.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/M-28.svg/40px-M-28.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/45/M-115.svg/40px-M-115.svg.png)
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.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Alger_County_H-58.svg/40px-Alger_County_H-58.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/69/Michigan_492_Marquette_County.svg/40px-Michigan_492_Marquette_County.svg.png)
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.
County Road 492 (CR 492, Co. Rd. 492) is a primary county road in Marquette County, Michigan. The road serves as an alternate route between Negaunee and Marquette. Several historic sites line the roadway as it runs south and parallel to the main highway, U.S. Highway 41 (US 41) and M-28, through the Marquette Iron Range in Michigan's Upper Peninsula. The path of the road runs near tracks of the Lake Superior and Ishpeming Railroad (LS&I). The locally created Iron Ore Heritage Trail will follow CR 492 through Eagle Mills and Morgan Meadows upon completion. The western terminus of the county road is on US 41/M-28 in Negaunee and the eastern end is in Marquette next to Lake Superior.
CR 492 was previously known as the Marquette–Negaunee Road before it was made a part of the State Trunkline Highway System. It was originally designated as a part of M-15 as early as 1917. The superintendent of the Marquette County Road Commission, Kenneth Ingalls Sawyer, painted the first rural highway centerline on the roadway on Dead Man's Curve. The highway was later a part of M-28 before being transferred back to county control. The highway assumed its current form by 2001. The eastern section along Brookton Road in Marquette Township was redesignated as a county secondary highway when a new connection to US 41/M-28 was opened, and the designation was extended along Wright Street on the west and north sides of Marquette. (Full article...)General images
Selected picture
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5f/LakeLindenMichiganDowntown2M26.jpg/400px-LakeLindenMichiganDowntown2M26.jpg)
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
Subcategories
Related portals
WikiProjects
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.