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.

Bypass green light for transponder equipped trucks bypassing the weigh stations

The green light to bypass a weigh
station for commercial vehicles equipped
with a transponder.

Find out how to purchase a transponder for a commercial vehicle, which allows the vehicle to be electronically screened and enables the driver to 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.

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.