Interstate 640

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Interstate 640 marker

Interstate 640
Route information
Maintained by TDOT
Length: 7.03 mi[1] (11.31 km)
Existed: 1982 – present
Major junctions
West end: I-40 / I-75
  US 441
East end: I-40 / US 25W / SR 9
Highway system
  • Tennessee State Routes
SR 476 US 641

Interstate 640 (abbreviated I-640) is a bypass of Interstate 40 running north of Knoxville, Tennessee. The route serves as an alternative for traffic going east on Interstate 40 intending to turn northward on Interstate 75, which has greatly relieved congestion in downtown Knoxville. Interstate 275 has also done that.

Route description[edit]

I-640 begins at an interchange with I-40 and I-75, where I-75 continues onto I-640. Initially heading northwest, I-640 and I-75 turn northeast, intersecting SR 62 before coming to an interchange with SR 9, US 25W, I-75, and I-275. As the freeway continues, US 25W and SR 9 run concurrently for the rest of its length. I-640 interchanges with SR 33 and US 441, as well as one providing access to the East Towne Mall. The highway then turns south and terminates at I-40.[2]


For many years only about a 2 miles (3.2 km) segment between State Route 33 (Broadway/Old Broadway exit) and U.S. Highway 25W (Clinton Highway exit) was open. Finally, the road was completed in anticipation of the traffic which was to be generated by the 1982 World's Fair. In 2009, a complete redesign near I-40 east of downtown added lanes, reconfigured exits, and improved safety.

Exit list[edit]

The entire route is in Knoxville, Knox County.

mi km Exit Destinations Notes
I-40 / I-75 south – Knoxville, Nashville, Chattanooga Westbound exit and eastbound entrance; western end of I-75 overlap; I-40/75 exit 385; western terminus
1 SR 62 (Western Avenue)
3B US 25W north (SR-9 north) / Gap Road – Clinton Western end of US-25W/SR-9 overlap
3 I-75 north / I-275 south – Knoxville, Lexington Eastern end of I-75 overlap
6 US 441 (Broadway, SR-33) / Old Broadway
8 Washington Pike, Mall Road South, Mall Road North, Millertown Pike
I-40 (US-25W south, SR-9 south) – Nashville, Asheville Eastbound exit and westbound entrance; East end of US-25W/SR-9 overlap; I-40 exit 393; eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


Route map: Bing

  1. ^ "Route Log - Auxiliary Routes of the Eisenhower National System Of Interstate and Defense Highways - Table 2". Federal Highway Administration. Retrieved 5 October 2014. 
  2. ^ Google (December 21, 2013). "I-640 Tennessee" (Map). Google Maps. Google. Retrieved December 21, 2013.