Amended by Stats. 2020, Ch. 262, Sec. 1. (SB 909) Effective September 29, 2020.
(a)No vehicle, except an authorized emergency vehicle, shall be equipped with, nor shall any person use upon a vehicle any siren except that an authorized emergency vehicle shall be equipped with a siren meeting requirements established by the department.
(b)An authorized emergency vehicle may also be equipped with a Hi-Lo audible warning sound
meeting requirements established by the department.
(c)A Hi-Lo warning sound may only be used to notify the public of an immediate evacuation in case of an emergency and is not a siren. For the purposes of Section 21055, a Hi-Lo shall not be used in lieu of a siren if the sounding of a siren is reasonably necessary pursuant to that section.
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