Speed Limit Laws: Washington
Rural Interstates: Cars (MPH)
70
GHSA maintains data on state laws surrounding a number of highway safety issues. Below is information regarding laws in the state of Washington. For more information, consult the State Highway Safety Office.
Universal helmet law enacted 1990.
6 or 8 years
70 and over: no electronic renewal
Per se >0 for some drugs
Decriminalized and legal for recreational and medical use
THC per se (5 ng)
70
60
60
60
60
60
0.15
90 days
With an ignition interlock driver's license
Mandatory for all convictions
yes
No
Under 2 years – rear-facing child restraint
2 to 4 years – child restraint with harness (rear or forward-facing)
4 years and older – car or booster seat until 4’9”
Up to age 13 years – must ride in back seat when practical
4’9” or taller
Adult seat belt fits properly
40 lbs or over in seating position with only lap belt
1 a.m. - 5 a.m. (secondary enforcement)
First 6 months: no passengers under 20 Remainder: no more than 3 passengers under 20 (secondary enforcement)
18 years
15 15 / 6 without driver's ed.
6
50 (10)
16
Primary
Over 16 or over 4'9"
All
Yes. Primary law.
No
Drivers with learner or intermediate license. Primary law.
All drivers. Primary law.
Permitted by state law
School speed zones, school walk routes, park zones, hospital zones, highway work zones, one camera per 10,000 residents in priority areas such as areas with higher rates or collisions or areas designated as problem racing zones
Permitted by state law and city ordinance
Statewide; at intersections of two arterials
Rural Interstates: Cars (MPH)
70
Ignition Interlocks
Mandatory for all convictions
Child Restraint Required
Under 2 years – rear-facing child restraint
2 to 4 years – child restraint with harness (rear or forward-facing)
4 years and older – car or booster seat until 4’9”
Up to age 13 years – must ride in back seat when practical
Full Privilege Minimum Age
18 years
Type of Law
Primary
Hand-Held Ban?
Yes. Primary law.
Speed Cameras
Permitted by state law
Red Light Cameras
Permitted by state law and city ordinance
Speeding
Double original fine
No
No
The Washington Traffic Safety Commission, Washington State Liquor Control Board and MillerCoors have partnered with Puget Sound area bars and restaurants to encourage social responsibility and safe rides after alcohol consumption.