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The Michigan Department of Transportation (MDOT) is a constitutional government principal department of the US state of Michigan.The primary purpose of MDOT is to maintain the Michigan State Trunkline Highway System which includes all Interstate, US and state highways in Michigan with the exception of the Mackinac Bridge.
The first state road agency, the Michigan State Highway Department (MSHD), was created on July 1, 1905. At first the department administered rewards to the counties and townships for building roads to state minimum specifications. In 1905, there were 68,000 miles (110,000 km) of roads in Michigan.
The Detroit Department of Transportation (DDOT) (pronounced DEE-dot) is the primary public transportation operator serving Detroit, Michigan.In existence since 1922, DDOT is a division of the city government, headed by a director appointed by the mayor.
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.
Portions of several major roads in the Detroit area were closed Wednesday because of flooding, according to the Michigan Department of Transportation. Michigan power outage map: Over 330,000 homes ...
MDOT is the agency responsible for the day-to-day maintenance and operations of the State Trunkline Highway System, which includes the U.S. Highways in Michigan.The numbering for these highways is coordinated through AASHTO, [6] an organization composed of the various state departments of transportation in the United States. [7]
Most of the following connectors are unsigned, [232] but they were inventoried publicly as part of the 6th edition of the Michigan Geographic Framework in 2006. [233] Up through the 7th edition, MDOT used a different numbering system, [234] which was changed in May 2008 with the publication of the 8th edition. [235]
The county-designated highways in Michigan comprise a 1,241.6-mile-long (1,998.2 km) system of primary county roads across the US state of Michigan. Unlike the State Trunkline Highway System , these highways have alphanumeric designations with letters that correspond to one of eight lettered zones in the state.