Clean Truck Check Credentialed Tester

Clean Truck Check in Madill, OK

1 credentialed tester in Madill.

Testers in Madill

Nearest in-person tester to Madill

The closest CARB-credentialed Clean Truck Check tester is Caravan Truck Service in Valley View, Texas — about 47 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Marshall 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
5
Trucking employees
49

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

Freight corridors near Madill

Madill sits on US-177, US-377, US-70, OK-199, OK-22 and OK-78. 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 Madill. Useful for routing a service stop around your CTC test.

+2 more within 25 miles.

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