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Green Light Preclearance Program

A Free Way to Save!

Green Light is a "preclearance" system that verifies truck size, weight, registration and safety records as you drive on the freeway. This allows motor carriers with a heavier than standard weight-steer axle to bypass Oregon automated weigh stations.
Once Green Light staff have verified the tire size for the truck's specific weight limit, a special code can be activated to indicate the truck is legally equipped with oversize tires on its steer axle. Of course, the truck must meet all other standard pre-screening requirements.

How to Get Started

  • ​The first transponder for each truck is FREE.
  • Save Time - Bypass weigh stations at highway speed.
  • Save Money - Save fuel and wear and tear on equipment.
  • Lessen safety hazards created by heavy traffic at weigh stations.
  • Enjoy better driver retention and easier driver recruitment.
  • Provide faster service to customers.
  • Qualify for the Trusted Carrier Partner Program.
  • Carrier´s account MUST be in good standing.
  • Truck MUST comply with size and weight regulations.
  • Carrier MUST have a “Satisfactory” safety rating with FMCSA.
  • Carrier MUST be in an “Acceptable” SAFESTAT category, as determined by the Federal Motor Carrier Safety Administration.
  • Truck MUST have a permanent Oregon motor carrier registration.
  • Truck MUST have three axles or more in combination with a minimum registered gross vehicle weight of 34,001 pounds.
  • Truck MUST visit Oregon automated weigh stations an average of at least once per month.

Green Light Weigh-in-Motion

​Interstate 5

  • Woodburn Port of Entry, Southbound.
  • Woodburn Weigh Station, Northbound.
  • Ashland Port of Entry, Northbound.
  • Ashland Weigh Station, Southbound.
  • Booth Ranch Northbound Weigh Station.
  • Booth Ranch Southbound Weigh Station.
Interstate 82
  • Umatilla Port of Entry, Southbound.
Interstate 84
  • Farewell Bend Port of Entry, Westbound.
  • Olds Ferry Weigh Station, Eastbound.
  • La Grande Weigh Station, Eastbound.
  • Emigrant Hill Weigh Station, Westbound.
  • Cascade Locks Port of Entry, Eastbound.
  • Wyeth Weigh Station, Westbound.
US Highway 97
  • Juniper Butte Weigh Station, Northbound.
  • Juniper Butte Weigh Station, Southbound.
  • Bend Weigh Station, Northbound.
  • Klamath Falls Port of Entry, Northbound.
  • Klamath Falls Weigh Station, Southbound.
OR Highway 58
  • Lowell Weigh Station, Westbound.
OR Highway 730
  • Cold Springs Weigh Station, Westbound.
  • Cold Springs Weigh Station, Eastbound.
US Highway 30
  • Rocky Point Weigh Station, Westbound.
Carriers are advised to watch for the OPEN / CLOSED sign at the entrance to Green Light weigh stations. Regardless of a red light transponder signal, a weigh station CLOSED sign takes precedence and excuses trucks from stopping.
Although a Green Light weigh station may be manned and appear to be open, enforcement officers will occasionally activate the CLOSED sign when:
  • Trucks back up in the queue.
  • Officers are busy processing trucks.

Carrying both transponders will likely cause problems because each transponder simultaneously emits its identifying signal. Even if you are traveling in Oregon with your Green Light transponder mounted correctly and your PrePass transponder stored in the glove box, there is still a good chance the system will detect the PrePass transponder signal first and spoil the chance to preclear the weigh station.

For trucks with both transponders, we recommend:

  • Use just the Oregon Green Light transponder.
  • Return the other transponder to Prepass.
  • Call 1-800-PrePass to ask them to enroll your Green Light transponder identification number into the PrePass preclearance system.

PrePass Transponders
The ID number that your PrePass transponder transmits is not recognized by the Oregon computer that runs the Green Light system. Oregon is not authorized to enter PrePass transponder numbers into the Green Light database. If you have questions about that policy, contact PrePass at 1-800-PrePass.

Terms and Conditions of Transponder Usage in Oregon

  • Transponders are installed only on designated vehicles and in accordance with ODOT policies.
  • Carrier may bypass an open port or weigh station only when the transponder indicates a green light.
  • Exception: Carriers whose vehicles are operating under a variance permit other than an extended weight permit must report to the weigh station even if they receive a green light.
  • Carrier will report any changes in the transponder application information to ODOT's Motor Carrier Transportation Division at 503-378-6054.
  • Carrier will report any changes in vehicles added to or removed from fleet operations to ODOT´s MCTD at 503-378-6054.
  • Carrier agrees to allow its registration base state to provide information regarding International Fuel Tax Agreement  and International Registration Plan accounts to ODOT´s MCTD for the purpose of providing bypass preclearance to its vehicles.



  • As you cross the weigh-in-motion scales, a device emits a laser beam across the roadway.
  • If your truck breaks the beam, it is higher than the legal limit and the Green Light system is programmed to send a red light signal to your transponder.
  • Even a truck operating within height limits could get a red light if a loose tarp flapping above the truck trips the laser beam.


  • The weigh-in-motion scales are set to error on the side of caution.
  • If your truck is under the legal limit or very close to that limit, the system may send a red light signal to your transponder and require that you check your weight on the weigh station static scales.


  • A truck will get a red light signal on its transponder if the trucking company has an unsatisfactory safety rating.
  • Green Light will also not preclear trucks operated by a company that is participating in the Performance and Registration Information Systems Management safety improvement program.

egistration and Tax

  • A truck will get a red light signal on its transponder if the trucking company´s account is suspended for failing to meet some regulatory requirement.
  • This can include failing to pay highway-use taxes or other fees.

​The program currently serves 3,924 companies with 31,104 trucks equipped with transponders. See how preclearance participation has grown:

  • July 2015  —  20 million.
  • February 2012  —  15 million.
  • July 2008  —  10 million.
  • January 2005  —  5 million.
  • February 2001  —  1 million.

Pollution Reduction Index


Contact Us

Oregon Department of Transportation
Motor Carrier Transportation Division
3930 Fairview Industrial Drive SE
Salem OR 97302-1166
David Fifer, Intelligent Transportation Systems Specialist
Hours of Operation (Pacific Time)
8 a.m. to 5 p.m.
Monday through Friday

Other Resources

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