(a) Upon the immediate approach of an authorized emergency vehicle equipped with at least one flashing lighted lamp of a color authorized by section twenty-six, article fifteen of this chapter, which is visible under normal atmospheric conditions from a distance of five hundred feet to the front of such vehicle other than a police vehicle when operated as an authorized emergency vehicle, and when the driver is giving audible signal by siren, exhaust whistle, or bell:
(1) 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.