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Interstate 640 shield
Interstate 640
Auxiliary route of the Interstate Highway System
Maintained by TDOT
Length: 7.03 mi[1] (11 km)
Formed: 1982
West end: I-40 / I-75
I-75 / I-275
East end: I-40 / US-25W / SR-9
Tennessee State Routes
< SR-476 US-641 >

Interstate 640 (abbreviated I-640) is a bypass of Interstate 40 running north of Knoxville, Tennessee. For many years only about a two-mile (3 km) segment of it between State Route 33 (Broadway/Old Broadway exit) and U.S. Highway 25 (Clinton Pike exit) was open. Finally, the road was completed in anticipation of the traffic which was to be generated by the 1982 World's Fair. Today it is especially important for traffic going east on Interstate 40 which intends to turn northward on Interstate 75; this has greatly relieved congestion in downtown Knoxville. However, much east–west traffic on Interstate 40 still ignores this bypass and continues on through the heart of the city, a potentially more-congested but more direct route.

Exit list

# Destinations Notes
I-40 / I-75 south – Knoxville, Nashville, Chattanooga Westbound exit and eastbound entrance
1 SR-62 (Western Avenue)
3B US-25W north (SR-9 north) / Gap Road – Clinton West end of US-25W/SR-9 overlap
3 I-75 north / I-275 south – Knoxville, Lexington East 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) - Asheville, Nashville Eastbound exit and westbound entrance




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