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The longest Interstate Highway in Tennessee is Interstate 40, at a length of 454.81 miles (731.95 km). The segment of I-40 in Tennessee is also the longest segment of all of the states the route traverses. The shortest mainline Interstate Highway in Tennessee is I-55, at a length of 12.28 miles (19.
Many of the routes are hidden in that they are overlaid on U.S. Routes and not signed. The mile markers throughout Tennessee, however, show the state route number for these hidden routes. The Tennessee Department of Transportation (TDOT) maintains these routes under the "State Highways" title of state law, [1] but
First State Road commemorative sign on US 70/SR 1 in Cumberland County. This highway was initially known as the Memphis to Bristol Highway. The Tennessee Department of Highways and Public Works was established by the Tennessee General Assembly in 1915 and tasked with constructing, maintaining, and improving roads throughout the state.
Map showing the route of US 64 in downtown Memphis. US 64 enters Tennessee on the Memphis-Arkansas Bridge in Memphis. The route shares the bridge with Interstate 55 (I-55) and US 61, US 70, US 78, and US 79. The route traverses several streets in Memphis before becoming a rural divided highway in eastern Shelby County.
The Tennessee leg of I-40 was among 1,047.6 miles (1,685.9 km) of Interstate Highways authorized for the state by the Federal-Aid Highway Act of 1956, commonly known as the Interstate Highway Act. [5] [95] Its numbering was approved by the American Association of State Highway Officials on August 14, 1957. [2]
This alignment was affirmed in a map produced by the Bureau of Public Roads, the predecessor agency to the Federal Highway Administration, in September of that year, [19] and I-65 was part of 1,047.6 miles (1,685.9 km) of Interstate Highways allocated to Tennessee by the Federal-Aid Highway Act of 1956, commonly known as the Interstate Highway ...
The U.S. Highways in Tennessee are the segments of the United States Numbered Highway System that are maintained by the Tennessee Department of Transportation (TDOT) in the state of Tennessee. All of these highways in Tennessee have a state highway designation routed concurrently along them, though the state highway is hidden and only signed ...
The highway begins at an interchange with U.S. Route 27/SR 29 (US 27/SR 29) in Soddy-Daisy. SR 111 travels generally northwest as a controlled access highway before it crosses into Sequatchie County. The controlled-access sections of SR 111 are unusual, as they contain 70 mph speed limits, which are generally reserved for Interstate highways.
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