|Maintained by ALDOT|
|Length||15.011 mi (24.158 km)|
|History||Designation approved in 2010|
|West end||I-65 in Montgomery|
|US 80 in Montgomery|
|East end||Future I-85 (SR 108) / US 80 in Montgomery|
Interstate 685 (I-685), is the designation for a future Interstate Highway in the U.S. state of Alabama. When completed, it will connect I-65 in downtown Montgomery to I-85 in the eastern suburbs of Montgomery. The routing is currently signed as I-85.
Currently, I-685 has been approved by the American Association of State Highway and Transportation Officials (AASHTO) to be co-signed with the current I-85 from its current southern terminus at I-65, to the future location of the Montgomery South Bypass on which I-85 will be rerouted. The open section of Future I-85 is temporarily designated as State Route 108. Future Interstate 685 is currently signed as Interstate 85.
The designation was approved in 2010 at the request of the Alabama Department of Transportation (ALDOT) to use existing I-85. Construction on the Montgomery Outer Loop started in early 2011, and the first part of it was completed in February 2016. When done, the I-85 designation will be shifted to the Outer Loop, and the existing freeway will become just I-685. This will be the first auxiliary interstate of Interstate 85 that starts with a six.
The entire route is in Montgomery, Montgomery County.
|0.000||0.000||—||I-65 / US 82 (SR 6) / Day Street west – Mobile, Birmingham||Southern terminus; I-65 exit 171; no access from eastbound Day Street to southbound I-65 or from northbound I-65 to Day Street; future western terminus of I-685|
|0.790||1.271||1||Court Street||Northbound exit and southbound entrance|
|1.290||2.076||1||Union Street||Southbound exit and northbound entrance|
|2.130||3.428||2||Forest Avenue||Northbound exit and southbound entrance|
|2.320||3.734||2||Mulberry Street||Southbound exit and northbound entrance|
|4.734||7.619||4||Perry Hill Road|
|6.546||10.535||6||US 80 west (SR 8 west) / US 231 (SR 53) / SR 21 (East Boulevard)||Southern end of US 80 / SR 8 concurrency|
SR 271 (Taylor Road) to US 231 (SR 53)
|Auburn University at Montgomery|
|11.009||17.717||11||SR 110 / SR 126 (Atlanta Highway) – Mitylene, Mount Meigs|
|15.011||24.158||15||Future I-85 / US 80 east – Atlanta, Meridian||Future I-85 rerouting; future eastern terminus of I-685|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|