Interstate 840 (Tennessee)
Interstate 840 (I-840), formerly State Route 840 (SR 840), is a freeway that serves as an outer bypass route around Nashville, Tennessee. Built by the Tennessee Department of Transportation (TDOT), it is also designated as Tennessee National Guard Parkway.[3] At 77.28 miles (124.37 km) long, it is the tenth-longest auxiliary Interstate Highway in the nation.[4] The route serves the cities of Lebanon, Murfreesboro, Franklin, and Dickson, all suburbs of Nashville.[5][6]
First proposed by former Governor Lamar Alexander as part of a system of Bicentennial Parkways, I-840 was constructed between 1991 and 2012. The highway was originally planned as an Interstate Highway but was constructed entirely with state funds and initially designated as a state route for this reason.[3] In 2015, the Federal Highway Administration (FHWA) and the American Association of State Highway and Transportation Officials (AASHTO) approved TDOT's request to redesignate SR 840 as I-840 as part of its integration into the Interstate Highway System. On August 12, 2016, TDOT announced that the route had officially been redesignated as I-840 and that resigning work would begin.[2]
