Federal & State Regulations | DOT marking identification - Washington

The Washington State Patrol has adopted 390.21 of the Federal Motor Carrier Safety Regulations (FMCSRs), as it exists on October 1, 2023.

The Washington Utilities and Transportation Commission prescribes rules and regulations for household goods carriers, solid waste collection companies, and common carrier brokers in the state of Washington. The agency has adopted 390.21 of the FMCSRs, as in effect on December 31, 2023.

Section 390.21 applies to vehicles with a gross vehicle weight rating of of 16,001 pounds or more, a combination of vehicles with a gross vehicle weight rating of 16,001 pounds or more inclusive of a towed unit, or a vehicle of any size used in the transportation of hazardous materials.

Additional Requirements

The Washington Utilities and Transportation Commission requires all intrastate for-hire (common and contract) motor vehicles to have an intrastate authority permit number displayed on each side of the power unit. Carriers may display their USDOT number instead of the Utilities and Transportation Commission authority number.
Motor vehicles owned and operated by farmers in the intrastate transportation of their own farm, orchard, or dairy products, including livestock and plant or animal waste, from point of production to market or disposal are required to have and display an intrastate DOT number. These vehicles are exempt from safety audits and compliance reviews.

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DOT marking identification - Washington