Ala. Code § 32-5A-373: Automated Photographic Speed Enforcement Systems.

(a) The department and authority may install automated photographic speed enforcement systems to monitor motor vehicle activity in a work zone.

(b) The automated photographic speed enforcement system shall be: (i) a photographic, radar, lidar, laser, or other device; (ii) designed to automatically detect the speed of moving motor vehicles; (iii) designed to automatically record digital imaging of a motor vehicle and an image of the rear license plate of a motor vehicle engaged in a speeding violation; and (iv) designed to automatically record the speed of a motor vehicle engaged in a speeding violation.

(c) The department, authority, or a third party approved by the department or authority may place automated photographic speed enforcement systems at work zones as necessary to assure the safety of the work zone. The department may adopt rules, including emergency rules, to implement this section and to provide for the approval of third parties under this section.