(a) On the immediate approach of an authorized emergency vehicle using audible and visual signals that meet the requirements of Sections 547.305 and 547.702, or of a police vehicle lawfully using only an audible signal, the operator of a streetcar shall immediately stop the streetcar clear of any intersection and remain there until the authorized emergency vehicle has passed, unless otherwise directed by a police officer.
(b) This section does not exempt the operator of an authorized emergency vehicle from the duty to drive with due regard for the safety of all persons using the highway.