No person shall start a vehicle which is stopped, standing or parked until such movement can be made with reasonable safety.
Before backing, operators of vehicles shall give ample warning, and while baking they shall exercise vigilance not to injure person or property on the street or highway or private property.
No person shall back a motor vehicle on a freeway, except: in a rest area; in the performance of public works or official duties; as a result of an emergency caused by an accident or breakdown of a motor vehicle.