Transponder & weigh station e-screening

E-screening helps safe and legal carriers bypass weigh stations by identifying, weighing, and checking commercial vehicles for violations as they drive. This helps enforcement target high-risk carriers.

A collage of two images. The image on the left is a bypass weigh station sign on the side of a roadway with the word bypass highlighted in green, indicating that a vehicle can bypass the weigh station. the image on the right is a WSDOT transponder.
Drivers can buy transponders (right) to get electronically screened and bypass weigh stations.


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.

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

Learn about the transponder program, which allows commercial vehicles to bypass weigh stations by electronically verifying the legal weight, safety rating, and credentials as the commercial vehicle continues down the road at freeway speeds.

Find technical support and answers to your questions about transponders, including troubleshooting tips and other helpful information.

Find out how we're using technology to improve commercial vehicle safety for more than 33,000 trucking companies with more than 245,000 transponder-equipped vehicles.

166,800 electric vehicle

registrations in Washington in 2023, up from 114,600 in 2022.

87 wetland compensation sites

actively monitored on 918 acres in 2023.

25,000 safe animal crossings

in the Snoqualmie Pass East Project area since 2014.