(a) Upon the immediate approach of an authorized emergency vehicle equipped with at least one lighted lamp and audible signal as is required by law, the driver of every other vehicle shall yield the right-of-way and shall immediately drive to a position parallel to, and as close as possible to, the right-hand edge or curb of the roadway clear of any intersection and shall stop and remain in such position until the authorized emergency vehicle has passed, except when otherwise directed by a police officer.
(b) This section shall not operate to relieve the driver of an authorized emergency vehicle from the duty to drive with regard for the safety of all persons using the highways.
(c) Authorized emergency vehicles shall be equipped with at least one lighted lamp exhibiting a colored light as hereinafter provided visible under normal atmospheric conditions from a distance of 500 feet to the front of such vehicle and a siren, exhaust whistle or bell capable of giving an audible signal. The color of the lighted lamp exhibited by police vehicles may be red or blue and the color of the lighted lamp exhibited by the fire department and other authorized emergency vehicles, including ambulances, shall be red. No vehicle other than a police vehicle will use a blue light. An amber or yellow light may be installed on any vehicle or class of vehicles designated by the Director of Public Safety, but such light shall serve as a warning or caution light only, and shall not cause other vehicles to yield the right-of-way. This provision shall not operate to relieve the driver of an emergency vehicle from the duty to drive with due regard for the safety of all persons using the highway nor shall it protect the driver of any such vehicle from the consequences of an arbitrary exercise of such right-of-way.