New Weigh Station Bypass Lets Qualified Trucks Skip Scales

Oregon has expanded a mobile weigh station bypass system that can allow qualified commercial trucks to continue past participating inspection sites without stopping.

The Oregon Department of Transportation announced on September 2 that the PrePass Bypass Mobile App is now operating at 19 sites across the state. Two additional locations were expected to become operational by the end of 2026.

The system provides bypass decisions directly through mobile or in-cab telematics devices. It can allow qualified carriers to bypass participating weigh stations at highway speed without installing a separate transponder.

How the New Weigh Station Bypass Works

The PrePass Bypass Mobile App uses GPS and internet connectivity instead of relying on a physical transponder.

According to ODOT, the system can operate hands-free on many ELD and other in-cab telematics equipment. Tablets and smartphones can also support the service.

As a participating truck approaches an Oregon weigh station, the system provides information used to determine whether the vehicle can bypass the facility.

The app transmits carrier safety scores, credential information and other compliance data to enforcement personnel. Trucks operated by carriers that meet Oregon’s safety and credential standards may then receive authorization to continue at highway speed.

Trucks that are not cleared must report as required.

Oregon Weigh Station Bypass Expands to More Sites

ODOT said bypass capability was available at 19 locations when the statewide expansion was announced.

Two more sites were expected to become operational before the end of the year. That would bring PrePass Mobile App availability to all 21 locations in Oregon’s Green Light weigh-in-motion network.

Those locations are spread across major freight routes, including Interstate 5, Interstate 84, Interstate 82, U.S. 97, U.S. 30 and Oregon 730.

ODOT’s Green Light program already allows eligible commercial vehicles to bypass automated weigh stations after the system checks information such as size, weight, registration and safety records.

The addition of the PrePass Mobile App gives participating carriers another way to receive those bypass decisions without needing a dedicated transponder.

Drivers Can Also Receive Safety Alerts

The system does more than provide weigh station bypass decisions.

ODOT said drivers using the PrePass app can receive in-cab safety alerts about highway conditions and potential hazards.

Current alerts can include warnings about steep grades, sharp curves and low clearances.

ODOT Commerce and Compliance Division Administrator Carla Phelps said the agency is also interested in adding alerts involving work zones and weather events in the future.

Those additional features are not currently guaranteed. ODOT described them as potential future enhancements.

Not Every Truck Can Bypass an Oregon Weigh Station

Using the mobile system does not mean a truck can automatically bypass every open weigh station.

ODOT says vehicles must meet applicable safety and credential standards before they may be cleared to continue at highway speed.

Oregon also has specific rules governing which commercial vehicles must report to open scales.

Commercial vehicles and combinations exceeding 20,000 pounds must stop when signs direct trucks over that weight into an open scale. In other situations, commercial vehicles and combinations with a GVW of 10,000 pounds or more generally must report to an open scale.

A vehicle directed to bypass by an approved weigh-in-motion system is exempt from stopping.

There is an important exception for oversize and heavy-haul operations. ODOT says vehicles transporting oversize or heavy-haul loads must report to an open scale even if they receive a green bypass signal.

PrePass Estimates Time and Fuel Savings

PrePass Safety Alliance says each successful bypass can save a carrier up to seven minutes and nearly half a gallon of fuel.

The organization also estimates operating-cost savings of as much as $11.75 for each successful bypass.

Those figures are estimates provided by PrePass Safety Alliance rather than guaranteed savings for every truck. Actual savings can vary depending on the location, traffic, equipment and other operating conditions.

ODOT’s existing Green Light preclearance program is designed around a similar concept. It allows compliant trucks to remain on the highway while enforcement officers focus on vehicles that require additional review.

Oregon Already Uses Other Preclearance Options

The PrePass mobile expansion does not replace Oregon’s existing Green Light system.

ODOT’s Green Light Preclearance Program verifies truck size, weight, registration and safety information while a commercial vehicle travels on the highway.

The state also supports compatible transponders and another mobile preclearance service through Drivewyze.

ODOT says PrePass-equipped carriers and owner-operators do not need to separately enroll in the Oregon Green Light program or obtain an additional Green Light transponder to use the PrePass mobile service.

Carriers instead enroll through PrePass.

Weigh Station Bypass Expansion Is Already Underway

The new Weigh Station Bypass option represents another way for qualified commercial vehicles to move through Oregon’s inspection network.

Unlike a proposed program or future project, the PrePass mobile expansion was already operating at 19 locations when ODOT announced it on September 2.

Two additional locations were scheduled to join the system by the end of 2026.

For participating carriers, the system can provide bypass decisions without requiring a dedicated transponder. However, drivers still have to follow Oregon’s weigh station requirements when they do not receive authorization to bypass or when their vehicle or load is required to report.