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The Interstates in Michigan have their origins in World War II-era expressways built in the Detroit area. After the system was created in 1956, the state highway department completed its first border-to-border Interstate in 1960. The last highway was completed in 1992, giving Michigan a total of 13 Interstate freeways.
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The state trunkline highways in Michigan carry approximately 51 percent of the state's traffic, as of 2007. [ 20 ] The highways in the system range in length from the unsigned Business Spur Interstate 375 (BS I-375) at 0.170 miles (0.274 km) and signed M-212 at 0.732 miles (1.178 km) to I-75 at 395.40 miles (636.33 km). [ 25 ]
The first of these revised assignments were shown on the 1971 state highway map; A-2 retained its number but B-1 was renumbered to H-40 in the Upper Peninsula. [6] Earl Rogers, the engineer-director of the County Road Association of Michigan stated at the time that the county road commissions would gradually phase in signage over the coming years.
US Highway number assignments on November 11, 1926, in Michigan. The US Highway System was approved on November 11, 1926. [1] At the time, 14 mainline highways were designated in Michigan. [2] Just two years later on November 12, 1928, US 102 was renumbered as part of an extended US 141, and the former designation was decommissioned. [11]
Number [236] Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes Connector 3: 0.724: 1.165 I-75 & I-375 in Detroit: M-3 in Detroit 1968 [237] current Part of the Fisher Freeway without a posted highway number; previously Connector 8 [234] Connector 5: 0.836: 1.345 M-5 in Farmington Hills
In America, 46,000 bridges have aging structures and are in “poor” condition, and 17,000 are at risk of collapse from a single hit, according to the American Society of Civil Engineers and the ...
M-46 is an east–west state trunkline highway in the US state of Michigan between Muskegon and Port Sanilac, terminating near Lake Michigan and Lake Huron on each end. Except for the north–south segment that corresponds with the US Highway 131 (US 131) freeway between Cedar Springs and Howard City, M-46 is practically a due east–west surface highway.