Section 820.370 - Ambulance or emergency vehicle sirens(1) Subject to any other law or rule pursuant thereto relating to the noise of a vehicle, the Department of Transportation may prescribe required sirens or other audible signals for ambulances and emergency vehicles. The requirements established under this section may include, but are not limited to, numbers required, placement, audibility and inside indicators.(2) Enforcement of the requirements established under this section is provided under ORS 820.380. 1983 c.338 §764; 1985 c.16 §365; 1985 c.79 §2; 1989 c.782 §39