Tow Trucks Lights.
Emergency tow trucks are required to have an identifying light that must: be red, revolve or flash intermittently, be visible from 360 degrees, and be visible from 500 feet under normal atmospheric conditions. Emergency tow trucks must use the light at the scene of an emergency or accident. A tow truck is not considered an authorized emergency vehicle and may not operate the light on the way to an accident or for any purpose other than at the scene of an emergency or accident.
Authorized Emergency Vehicle.
An authorized emergency vehicle is:
Authorized emergency vehicles using signal equipment consisting of a red visible light and a siren requires drivers to yield right-of-way and stop.
Emergency or Work Zones.
An emergency or work zone is defined as the adjacent lanes of the roadway 200 feet before and after:
If the highway has four or more lanes, at least two of which are intended for traffic proceeding in the same direction as the motor vehicle approaching the emergency or work zone, the driver of any motor vehicle must proceed with caution and, if the opportunity exists, with due regard for safety and traffic conditions, yield the right-of-way by making a lane change or moving away from the lane or shoulder occupied by an emergency or work-zone vehicle.
On a highway having fewer than four lanes, the driver of a motor vehicle must proceed with caution, reduce the speed of the vehicle, and, if the opportunity exists, with due regard for safety and traffic conditions, and following all applicable rules of the road, yield the right-of-way by passing to the left at a safe distance and simultaneously yield the right-of-way to all vehicles traveling in the proper direction on the highway.
On any highway, if changing lanes or moving away would be unsafe, the driver of a motor vehicle must proceed with due caution and reduce the speed of the vehicle to at least 10 miles per hour (mph) below the posted speed limit.
The requirements on drivers approaching or in an emergency or work zone are referred to by organizations, including the WSP, as the "Slow Down, Move Over" law.
Tow Truck Lights.
Tow trucks may use rear-facing blue lights at the scene of an emergency. Tow trucks may use an intermittent or flashing red light while reentering the roadway from the scene of an emergency or accident for a reasonable distance to reach operating speed.
Authorized Emergency Vehicle.
Fire department vehicles may use rear-facing blue lights at the scene of an emergency.
Emergency or Work Zones.
Any driver on a highway with four or more lanes must reduce the speed of the vehicle when approaching an emergency or work zone. Any driver who is unable to change lanes on a road passing an emergency or work zone and is proceeding with due caution in an adjacent lane is required to reduce the speed of the vehicle to 50 mph or lower when the posted speed limit exceeds 60 mph or more.
The Department of Licensing (DOL) must develop an appropriate training module, for inclusion in all new driver training curriculums, relating to the requirements that apply when approaching and in an emergency or work zone. The DOL must provide each driver license applicant with written materials regarding the requirements that apply to drivers when approaching and in an emergency or work zone and place signage in each licensing service office providing background on the written materials.
The Washington State Department of Transportation must substantially increase the use of roadway signage and electronic display sign boards along roadways to reflect the emergency or work-zone requirements.
The DOL and the Washington Traffic Safety Commission must develop a statewide public awareness campaign to inform and educate Washington citizens about the "Slow Down, Move Over" law.