It shall be the duty of every driver of an ambulance to obey all traffic rules established by statute or ordinance with the following exceptions: when the ambulance is being used in response to an emergency situation, and the same is operated at a speed in excess of forty (40) miles per hour and directed to disregard traffic laws for the purpose of a specific trip, the ambulance shall be operated in complete conformance with every other motor vehicle law and regulation by statute or ordinance in which ambulances are operated, relating to the operation of motor vehicles, as such provision applies to motor vehicles in general, except laws and regulations pertaining to compliance with official traffic-control devices or to vehicular operation upon the right half of the roadway. (Ord. 73-39, 10-15-1973)