Register a transponder

Learn how to register, update, transfer or add a transponder for your commercial vehicle.

Transponders are registered to a VIN and can be moved to a new vehicle by sending a request in writing by fax or email. Updates made in Washington are automatically forwarded to Idaho, South Dakota, New York and Connecticut.

To make changes to a registered transponder, contact us via fax or email.

Register, update or transfer a transponder

Include the following in a fax or email to register, update or transfer a transponder:

  • A copy or picture of the commercial vehicle’s registration/cab card
  • The USDOT Number
  • The transponder number or a picture of the transponder with the barcode numbers
    (For multiple updates at once, write the transponder number on the registration/cab card or include a list with the plate and VIN they go with)

Remove a transponder

To delete a transponder, include the following in a fax or email:

  • The transponder number or license plate and state
  • Request for it to be canceled/deleted

8,683 animals crossed the Snoqualmie Pass East Project area

as recorded by WSDOT and partners in 2020 and 2021.

46% increase in Amtrak Cascades ridership to 251,000 passengers

in 2021 compared to 172,000 in 2020.

Nine wetland and stream mitigation sites across 32.7 acres added

to our monitoring program in 2021 to help offset climate change impacts.