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English: A map of Tennessee's current highway system as of June 14th, 2023. Green are parkways, yellow are U.S. Highways, Black are Tennessee State Routes (both primary and secondary), and blue are interstate highways.
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. That year, the 538-mile (866 km) Memphis to Bristol Highway, later State Route 1 , was designated as the first state highway in Tennessee.
The triangle marker design was the only design until November 1983, when Tennessee divided its routes into primary routes and secondary or "arterial" routes with the adoption of a functional classification system, creating a primary marker and making the triangle marker the secondary marker; primary marker signs were posted in 1984.
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 ...
In Tennessee, U.S. Route 412 (US 412) stretches for 181.93 miles (292.79 km) through the farmland of West Tennessee and the hills of Middle Tennessee, starting at the Missouri state line (on I-155 at the Mississippi River) near Dyersburg and running to an interchange between I-65 and SR 99 in Columbia. [1] [2]
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 ]
The "choice lanes" are a first for Tennessee and will be the largest project in TDOT history. Tennessee's new toll lanes to charge more when traffic's bad. Here's what to know
U.S. Route 421 (US 421) is a north–south United States highway that runs for 43.4 miles (69.8 km) in East Tennessee, connecting the cities of Mountain City and Bristol. The entire route is overlapped with SR 34 , save for approximately a half mile between US 11E / US 19 and the Virginia State Line.