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Traffic Laws, Rules, Standards, and Best Practices for Cities and Counties

For questions, assistance, or recommendations on specific situations, please contact the Traffic Services Manager . However, for questions pertaining to citations received, please contact the jurisdiction that issued the citation: city or town, county, tribe, or Washington State Patrol.

WA State capitol building with State Patrol car.

Traffic-related State Laws & Rules


Search for State Laws and Rules

Washington State Legislature Web page

Manual on Uniform Traffic Control Devices

Definitions and Roles

Rules for Drivers

Jurisdictional Issues

Maintenance Guidance for Local Agencies

City Streets as State Highways Guidelines Reached by WSDOT and the Association of Washington Cities. These guidelines interpret RCW 47.24 regarding construction, operations, and maintenance responsibilities of the state and cities on state highways that serve as city streets.

More Rules and Standards for Local Agencies

Some cities and counties adopt WSDOT or other standards. See your city or county code for these standards. For projects with federal funding, see the Local Agency Guidelines (LAG)  manual.

Roadway Users with Disabilities

Traffic Control Devices and MUTCD


Federal Laws and Standards

The United States Code of Federal Regulations (CFR) Title 23 Highways, Section 655.603 requires that states follow the Manual on Uniform Traffic Control Devices (MUTCD). Revised Code of Washington (RCW) 47.36.030 requires that agencies in Washington state follow uniform standards for the placement of traffic control devices. Washington Administrative Code (WAC) 468-95  makes the 2009 MUTCD  that standard. WAC 468-95 modifies sections of the MUTCD for Washington state's laws and unique circumstances.

Washington State Laws and Rules

Best Practices