Buy a transponder
Learn how to buy a transponder for a commercial vehicle, a tool that allows the vehicles to be electronically screened and lets eligible drivers bypass weigh stations.
Commercial vehicle drivers or carriers with a gross vehicle weight of 16,000 lbs or more can buy a transponder to be electronically screened as the commercial vehicle approaches a weigh station. E-screening allows safe and legal carriers to bypass weigh stations after checking criteria such as the legal weight/height, safety rating and registration information.
Transponders are registered to a VIN and the e-screening system uses the commercial vehicle information from the registration/cab card.
- The commercial vehicle registration/cab card must be current.
- An active USDOT number must be provided (Carrier Responsible for Safety).
- All required taxes and fees must be paid.
Buy a transponder
Step one: Get a transponder application
To get a transponder application, you can either:
- Download a transponder application (PDF 128KB).
- Email TransponderAdmin@wsdot.wa.gov or call Transponder Administration at 888-877-8567 to ask for a faxed, mailed, or emailed application.
Step two: Mail in your application with a check
- Complete the application.
- You can use one application to purchase multiple transponders mailed to the same address.
- Send a check or money order to WSDOT for the total cost of the transponder(s) purchased.
- (Optional) Register the transponder(s) by including a copy of the registration/cab card for each commercial vehicle.
- We are unable to accept credit cards or any form of electronic payment.
Send checks or money order to:
Washington State Department of Transportation
310 Maple Park Avenue SE
PO Box 47305
Olympia WA 98504-7305
After your application and payment are processed, we mail out transponders and you should typically receive your order in the mail within 7-10 business days of the check clearing. The transponder is registered if it has a license plate sticker attached or you’ve received a list of assigned transponders and plates with your order. Applications without registration/cab cards will have transponders mailed unassigned.
We charge a one-time $35 fee per transponder.
- When you receive the transponder, it belongs to you. You own the transponder.
- There are no additional fees for using a transponder in Washington.
- Transponders have a 3 to 5-year average battery life (depending on use).
- Transponders do not have replaceable batteries.
- Once the transponder stops working, you will need to purchase a new transponder.
- Do not return non-working WSDOT issued transponders to us.
- Follow your regional guidelines for lithium ion batteries when disposing a transponder.