Code of Alabama
Part 3 - Photographic Traffic Enforcement.
Section 45-37A-42.12 - Control Devices and Timing.

The placement of control devices in the city and timing of yellow lights and red light clearance intervals shall conform to the most recent edition of the Traffic Engineering Handbook. It shall be presumed that such devices and timing are in compliance with this section unless the contrary is shown by a preponderance of the evidence.