Clean Truck Check Credentialed Tester

Clean Truck Check in Williamsport, PA

1 credentialed tester in Williamsport.

Testers in Williamsport

Nearest in-person tester to Williamsport

The closest CARB-credentialed Clean Truck Check tester is TRUCK ZONE SERVICE CENTER in Milton, Pennsylvania — about 20 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Lycoming County

Clean Truck Check applies to heavy-duty vehicles that operate in California — including out-of-state trucks based here that run loads west.

Trucking establishments
48
Trucking employees
598

Source: FMCSA MCMIS carrier census, US Census County Business Patterns 2021.

Freight corridors near Williamsport

Williamsport sits on I-180, I-80, I-99, US-15, US-220 and PA-405. Trucks running these routes into California fall under CARB’s Clean Truck Check — Smart CTC lets them test remotely without leaving the road.

Source: OpenStreetMap (© OpenStreetMap contributors).

Nearby truck stops

OpenStreetMap-tagged truck stops, services areas, and HGV-marked fuel stations within 25 miles of Williamsport. Useful for routing a service stop around your CTC test.

+2 more within 25 miles.

Source: © OpenStreetMap contributors. Last updated 2026-05-26.