Enforces motor vehicle laws to promote safety and reduce accidents, expedite traffic flow; enforce state statutes; regulates traffic and parking by using citations, warnings, and verbal direction; assists motorists with vehicle problems; determines severity and location of accidents by evaluating information and observing accident scene; visually inspects all types of vehicles to determine equipment safety, proper registration, licenses, permits, and driver conditions. Protects and secures accident, disaster, and crime scenes to preserve evidence, and protects people and property by using techniques including additional manpower, sealing off the area, barricades, locking and guarding establishments, properly placing patrol car, red lights, and flags, and re-routing traffic; administers medical aid to preserve life, alleviate suffering, minimize injuries, prevent shock, and prepare for transportation to medical facility.