Alabama Code Title 6. Civil Practice § 6-5-702

During the course of construction, a contractor who constructs, maintains, or repairs a highway, road, street, or bridge for the awarding authority is not liable to a claimant for personal injury, property damage, or death arising from the performance of such construction, maintenance, or repair, if, at the time of the personal injury, property damage, or death, the contractor was in compliance with contract documents material to the condition, including the traffic control plan, that was the proximate cause of the personal injury, property damage, or death unless following the plans and specifications would result in a dangerous condition that should have appeared to be defective to a reasonably prudent contractor or that the contractor should have known that following the plans and specifications could create a dangerous condition that caused the injury or death.