ARS § 28-650

28-650 - Warning devices at construction sites 28-650 . Warning devices at construction sites A person, contractor or political subdivision performing work on roads, streets or highways shall post and maintain warning signs, signals, markers and barricades that are in compliance with the manual and specifications prescribed in section 28-641. These warning signs, signals, markers or barricades shall be maintained at the work site to warn those using the street, road or highway until the work is completed or until such time as the governing body authorizes removal. Â