Clean Truck Check Credentialed Tester

Clean Truck Check in West Union, OH

1 credentialed tester in West Union.

Testers in West Union

Nearest in-person tester to West Union

The closest CARB-credentialed Clean Truck Check tester is TSS TRUCK SERVICE in Dayton, Ohio — about 76 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Adams 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
13
Trucking employees
46

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

Freight corridors near West Union

West Union sits on US-52, US-62, US-62-Business, US-68, AA and KY-10. 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 West Union. Useful for routing a service stop around your CTC test.

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