|Auxiliary route of I-75|
|Maintained by TDOT|
|Length||2.98 mi (4.80 km)|
|Existed||1980[not verified in body]–present|
|History||1958-1980 (as a part of I-75)|
|South end||I-40 in Knoxville|
|North end||I-75 / I-640 / US 25W in Knoxville|
Interstate 275 (I-275) is an Interstate Highway in Tennessee that serves Knoxville by connecting the downtown with I-75/I-640/US Route 25W (US 25W). Measuring 2.98 miles (4.80 km) in length, it runs from a northern terminus at the junction with I-75/I-640/US 25W to a southern terminus at I-40.
I-275 begins at a complicated interchange with I-40 in Downtown Knoxville. US 441 southbound (Henley Street), State Route 62 (SR 62, Western Avenue), and 11th Street are also directly accessible from I-275 southbound at this interchange, and northbound I-275 is directly accessible from US 441 northbound and SR 62 here. About 0.6 miles (0.97 km) north of this point, I-275 has an interchange with Baxter Avenue and then Woodland Avenue about 0.35 miles (0.56 km) later. The route then curves sharply to the northwest and then sharply to the northeast about 0.4 miles (0.64 km) later and crosses a railroad before reaching an interchange with Heiskell Avenue about 0.6 miles (0.97 km) later. Passing through Sharp's Gap, a low point in Sharp's Ridge, I-275 reaches its northern terminus with I-75, I-640, and US 25W about 0.75 miles (1.21 km) later. At this interchange, the route crosses I-640, and continues north as I-75. US 25W northbound is accessible from a flyover ramp that splits off from I-275 northbound about 0.1 miles (0.16 km) south of I-640.
The freeway that is now I-275 was first planned in the 1940s as part of a series of freeways for the city of Knoxville and was known initially as the North–South Expressway. The route was integrated into the Interstate System as part of I-75, and the southern terminus was the end of a concurrency with I-40 and I-75. The route was renumbered I-275 in December 1980, when I-75 was rerouted onto the new I-640 to divert traffic from the downtown area.
Work on most of the route began in March 1958, and the first section, located between I-40 and Baxter Avenue, opened on October 28, 1960, after several delays. The final section, located between Oldham Avenue and Heiskell Avenue, opened on January 24, 1962. A dedication ceremony for this section took place on February 9, 1962.
Between December 1, 2006, and January 26, 2008, the existing cloverleaf exits (1A–B, 1C–D, 2A–B) were replaced with traditional diamond interchanges to add a continuous third lane in each direction. This was done to handle increased traffic flow for the shutdown of I-40 in Downtown Knoxville that took place on May 1, 2008. I-275 was the designated detour route for I-75 northbound traffic during the I-40 shutdown to avoid traffic congestion at the I-75/I-640/I-275/US 25W junction as the ramp for I-75 northbound from I-640 eastbound is only one lane.
I-40 west to I-75 south – Nashville, Chattanooga
|Southbound beyond the 275/40 interchange exit ramps are for Henley St. (US 441) & Western Ave./Summit Hill Dr. (TN 62); I-40 exit 387A|
I-40 east / US 441 south – Asheville
|Continues as Henley St. (US 441) southbound beyond this exit and the following exit to TN 62 (Western Ave./Summit Hill Dr.); I-40 exit 388 eastbound; southern terminus|
|0.68||1.09||1A||Baxter Avenue||Formerly exits 1A-B|
|1.04||1.67||1B||West Woodland Avenue, West Oldham Avenue||Formerly exits 1C-D|
|2.23||3.59||2||Central Street, Heiskell Avenue||Formerly exits 2A-B|
I-75 south / I-640 / US 25W – Clinton, Asheville
|Northbound exit and southbound entrance|
I-75 north – Lexington
|Northbound exit and southbound entrance; northern terminus|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- "Interstate 275 - Tennessee". Interstate Guide. Retrieved October 5, 2014.
- Long Range Planning Division Office of Data Visualization (2018). Knox County (PDF) (Map). Tennessee Department of Transportation.
- "Governor To Open West Leg of I-640/75". The Knoxville News-Sentinel. Knoxville, Tennessee. December 21, 1980. p. B-10. Retrieved June 21, 2022 – via Newspapers.com.
- "First X way Link To Open Friday". The Knoxville News-Sentinel. October 26, 1960. p. 32. Retrieved November 28, 2020 – via Newspapers.com.
- "X-way Link Open". The Knoxville News-Sentinel. October 29, 1960. p. 6. Retrieved November 28, 2020 – via Newspapers.com.
- "North X-way Now Open to City Limits". The Knoxville News-Sentinel. January 24, 1962. p. 1. Retrieved November 28, 2020 – via Newspapers.com.
- "Traffic Starts on New Viaduct". The Knoxville Journal. January 25, 1962. p. 3. Retrieved November 28, 2020 – via Newspapers.com.
- "North Expressway Open To Traffic". The Knoxville Journal. February 10, 1962. p. 11. Retrieved November 28, 2020 – via Newspapers.com.
- "N. X-way Dedicated in Brief Ceremony". The Knoxville News-Sentinel. February 10, 1962. p. 9. Retrieved November 28, 2020 – via Newspapers.com.
- I-275/I-640 Improvements (TDOT)
- Jacobs, Don (November 28, 2006). "Work begins today on $20M update for Interstate 275". The Knoxville News-Sentinel. p. 7B.
- Interstate 275 (Tennessee) at AARoads.com