Clean Truck Check Credentialed Tester

Clean Truck Check in Cooper, TX

1 credentialed tester in Cooper.

Testers in Cooper

Nearest in-person tester to Cooper

The closest CARB-credentialed Clean Truck Check tester is Lone Star Tire Diesel Service in Dallas, Texas — about 75 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Delta 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
3
Trucking employees
1

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

Freight corridors near Cooper

Cooper sits on FM-1528, FM-2653, Loop-178, Loop-301, TX-11 and TX-154. 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 Cooper. Useful for routing a service stop around your CTC test.

Source: © OpenStreetMap contributors. Last updated 2026-05-27.