U.S. Highway 29 (US 29), internally designated by the Alabama Department of Transportation as State Route 15 (SR 15), is a southwest–northeast state highway across the southeastern part of the U.S. state of Alabama. US 29 and SR 15 traverse Alabama in a general northeast–southwest slope. It has never been a major route in the state; its significance was completely overshadowed with the completion of Interstate 65 (I-65) and I-85 during the 1970s. Today, US 29 and SR 15 serve primarily to connect numerous smaller towns and cities in the southwest, south-central, and eastern parts of Alabama.