US Route 431, also called SR 1, runs from Medianville, AL, at the Tennessee state line in the north to Dothan, AL, a few miles from the Florida border. The “Highway to Hell,” this 353-mile road, is notoriously dangerous. Although mainly four lanes, US Route 431 suddenly changes to two lanes in several sections.
Alabama's "Highway to Hell" is known for its low visibility, dangerous curves, and high speeds due to its varying lanes and merging. Motorists should watch the left and right sides of their vehicles for merging traffic.