Interstate 24 spans the Tennessee River across a steel through arch bridge built in 1974. 04/05/13
Interstate 24 takes a northwest to southeast orientation from Southern Illinois across western Kentucky and into Tennessee. The freeway even enters Georgia briefly. Connecting Chattanooga, Nashville and Paducah, Kentucky, I-24 also provides a part of a regional route to destinations such as Atlanta, Chicago and St. Louis. Some signage for I-24 in Nashville even listed the western control city as St. Louis, even though the freeway does not extended that far west.
I-75/24 Interchange Modification
The Tennessee Department of Transportation (TDOT) awarded a $132.64 million contract on December 21, 2018 for the design-build project upgrading the exchange joining the east end of Interstate 24 with I-75 in Chattanooga. Work through June 2021 started in Fall 2019.
Construction relocated ramps to and from I-24 to I-75 to the right side and expanded all other ramps at the systems interchange. Additionally the entrance ramp from U.S. 76 (Ringgold Road) west was extended along a distributor roadway to the adjacent Tennessee Welcome Center, with a grade separation added above the I-75 off-ramp to the rest area. The Spring Creek Road overpass on I-24 was also replaced.
Construction replacing the Spring Creek Road overpass. Spring Creek Road spans I-24 on the west side of the exchange with I-75. Photo by Peter Johnson (02/29/20).
Parallel U.S. Routes
Leading south from I-57 to Metropolis in Illinois, I-24 somewhat parallels U.S. 45. U.S. 45 leaves the freeway corridor at Paducah, Kentucky, with U.S. 60 paralleling the route east to Reidland and U.S. 62 to I-69 at Eddyville. Angling southeast toward Clarksville, I-24 travels solo until the Hopkinsville vicinity, where U.S. 41 Alternate accompanies the route south into Nashville. U.S. 41 and I-24 parallel one another closely from the capital city of Tennessee south to Chattanooga. U.S. 64/72 join U.S. 41 as I-24 dips into Georgia as well.
The final portion of Interstate 24 in Illinois to open was the 14 mile long highway from U.S. 45 north of Vienna to I-57. This stretch opened in late January 1976 at a cost of $32.5 million.7
First conceptualized through western Kentucky in 1958, Interstate 24 was completed in the state on May 23, 1980 when a 23 mile long section opened to traffic from Western Kentucky Parkway to U.S. 68 east of Cadiz. Groundbreaking on the first portion of I-24 in the Bluegrass State took place in Lyon County in December 1967.1 The 28 mile long section between U.S. 68 and the Tennessee state line opened in early September 12, 1975 at a cost of $29.7 million.2
The Ohio River bridge between Metropolis, Illinois and Paducah, Kentucky opened to traffic in October 1974 at a cost of $18.6 million.3 Structural problems discovered, including 119 cracks as a result of defective welding in the tie girders, led to the closure of the span on August 3, 1979.4,5 The tied-arch bridge remained closed to all traffic through October 1980 and truck traffic until the Summer of 1981.6
Within Nashville, Interstate 24 has a short overlap with I-65 leading south toward Downtown. Renumbering of Interstate 265 to I-65 in 2000 shortened the concurrency between the two routes in an effort to better partition through traffic around Downtown.
Interstate 40 west at the three-wye interchange where the two combine in Nashville. I-24/40 overlap 1.8 miles to Downtown. 04/04/13
Further south at Monteagle, Tennessee, the roadways of Interstate 24 separate by a substantial distance due to the terrain. I-24 was constructed across Monteagle Mountain between 1962 and 1968.8 The eastbound roadway for I-24 incorporated what was a three lane route for U.S. 41/64. Reconstruction of the eastbound lanes to modern standards during the 1980s left the westbound lanes with two lanes of traffic per direction separated by a concrete barrier.9 The Ridge cut section of Interstate 24 in Chattanooga was dedicated on December 1, 1965.10