Interstate 440 (abbreviated I-440, signed as Four-Forty Pky) in Tennessee is a 7.64-mile (12.30 km)-long loop connecting Interstate 24, Interstate 40, and Interstate 65, bypassing downtown Nashville to the south. The section between I-24 and I-65 was completed in 1986, and the section between I-65 and I-40 was completed in 1987. It was the most expensive road, per mile, built in Tennessee at the time. In the beginning it was called Four-Forty Parkway and trucks were not permitted to use it, but eventually it became open to trucks. With only two lanes in each direction and an AADT of 106,219, it is one of the most congested rush-hour highways in the state.
Temporary Speed Limit of 45 mph on an eastern portion of Interstate 440
I–440 heads south from I–40, west of downtown Nashville. I–440 has an interchange with U.S. Route 70S (US 70S) before turning due east. Then I–440 has an interchange with U.S. Route 431 in Tennessee (US 431). I–440 has an interchange with I–65 south of downtown Nashville. I–440 then turns northeast having an interchange with U.S. Route 31A/U.S. Route 41A. I–440's eastern terminus is at I–24, west of the Nashville International Airport. 
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A 1955 map depicting plans of what later became Interstate 440
Route map: Google / Bing