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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".
Transportation in Montana comprises many different forms of travel. Montana shares a long border with Canada, hence international crossings are prevalent in the northern section of the state; there are 13 road crossings and one rail crossing. As the fourth-largest state in the United States, [1] journeying from one side to the other takes a ...
The U.S. Highways in Montana are the segments of the United States Numbered Highway System owned and maintained by the Montana Department of Transportation (MDT) in the U.S. state of Montana. Mainline highways
During the spring of 2005, several large mudslides and rockslides on May 19–20 damaged or destroyed the Montana side of the Beartooth Highway in a dozen places between mile markers 39 and 51. The road was closed for reconstruction, and a $20.4 million construction contract issued which stipulated an October 2005 completion date.
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 secondary highway system is a lower-level classification of state highway maintained by the Montana Department of Transportation (MDT) in the US state of Montana. Secondary highways first appeared on the state highway map in 1960, [ 1 ] even though the secondary system was established in 1942. [ 2 ]
At its southern end, MT 3 begins at I-90 in Billings and travels northwest 47 miles (76 km) to US 12 near Lavina – this is the only section of MT 3 that is not concurrent with a US highway.
The road travels through hilly ranch country near the eastern edge of the Crazy Mountains to Harlowton, where US 191 is briefly concurrent with US 12. North of Harlowton, US 191 is concurrent with MT 3 for 39 miles (63 km) to Eddie's Corner , where US 191 proceeds eastward to Lewistown on a roadway shared with US 87 and MT 200 , in a wrong-way ...