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|Maintained by ALDOT|
I-85 / US 80
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.
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.[ citation needed] 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. 
This section contains a table that is missing mileposts for one or more junctions.
All exits are opened as I-85, but are not signed as I-685
|--||Day Street||Southbound exit and northbound entrance; Future Western Terminus of I-685|
|0||I-65 / US 82 – Mobile, Birmingham||I-65 exit 171; southbound exit and northbound entrance; and signed as exits 0A (south/east) & 0B (north/west); eastbound to 65 north signed as exit 0.|
|1||Court Street, Union Street||Eastbound Court Street, westbound Union Street|
|2||Forest Avenue, Mulberry Street||Eastbound Forest Avenue, westbound Mulberry Street|
|4||Perry Hill Road|
|6||US 80 west / US 231 / SR 21 (East Boulevard, SR-8/ SR-9/ SR-53)||Begin U.S. 80 concurrency|
|9||SR 271 (Taylor Road) to US 231 ( SR-53)|
|11||SR 126 ( SR-8) / SR 110 – Mitylene, Mount Meigs|
|14.44||23.24||14||I-85 (Montgomery South Bypass, SR-685) / SR 108||Future exit number|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
|Wikimedia Commons has media related to Interstate 685.|
- Special Committee on U.S. Route Numbering (October 29, 2010). "Report to the Standing Committee on Highways" (PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived (PDF) from the original on October 16, 2017. Retrieved December 13, 2011.
- Shryock, John. "Outer Loop construction about to restart". Montgomery, AL: WSFA-TV. Retrieved December 13, 2011.