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Montana's secondary system was established in 1942, [4] but secondary highways (S routes) were not signed until the 1960s. [1] S route designations first appeared on the state highway map in 1960 [5] and are abbreviated as "S-nnn". Route numbers 201 and higher are, with very few exceptions, exclusively reserved for S routes.
Massachusetts welcome sign on a snowy road: Michigan Michigan welcome sign with a stylized M: Minnesota Minnesota welcome sign, in the shape of the state: Mississippi Welcome sign for Mississippi from October 2006: Missouri Welcome sign for Missouri, with the two S' replaced with a snaking river: Montana Montana welcome sign seen while entering ...
In 1918, Wisconsin became the first state to number its highways in the field followed by Michigan the following year. [1] In 1926 the American Association of State Highway Officials (AASHO) established and numbered interstate routes (United States Numbered Highways), selecting the best roads in each state that could be connected to provide a national network of federal highways.
The state's Interstate highways, totaling 1,198 miles (1,928 km), were built between 1956 and 1988 at a cost of $1.22 billion. 95 percent of the system serves rural areas, the highest proportion of any state under Interstate program. [1] The entire Interstate system in Montana was designated as the Purple Heart Trail in 2003. [2]
The 11th edition of the MUTCD was released on December 19, 2023. [1] The effective date, 30 days after publication, of the MUTCD was January 18, 2024.
U.S. Highway 2 (US 2) is an east–west United States Numbered Highway in the state of Montana. It extends approximately 666.645 miles (1,072.861 km) from the Idaho state line east to the North Dakota state line.
Since the policy on numbering and designating US Highways was updated in 1991, AASHTO has been in the process of eliminating all intrastate U.S. Highways under 300 miles (480 km) in length, "as rapidly as the State Highway Department and the Standing Committee on Highways of the American Association of State Highway and Transportation Officials ...
US 287 was originally designated as Montana State Highway 287 (MT 287). The Montana State Highway Commission first assigned the MT 287 designation in 1958 to a cross-state route from Yellowstone National Park at West Yellowstone to the Canada–United States border at the Piegan–Carway Border Crossing between Babb and Cardston, Alberta.