Washington Utilities and Transportation Commission
All Common Carriers with a Gross Vehicle Weight Rating of 16,001 pounds or more must obtain a U.S. Department of Transportation number (USDOT) even if they only operate intrastate (within Washington state.)
Other Carriers Regulated by the Commission
2009 House Bill 1843 requires all entities with commission authority under the following chapters of the RCW to obtain a USDOT number by January 1, 2010:
If you already operate in interstate commerce and have a DOT number, you do not need to do anything.
You may apply for a USDOT number at the Federal Motor Carrier Safety Administration (FMCSA) website.
Click on "Online Registration without help"Even if the FMCSA website indicates that you do not need a USDOT number, Washington law requires a USDOT number for intrastate operations.If you have any other questions about USDOT numbers or how to apply for one please call the Washington State Patrol at (360) 596-3812.