Clean Truck Check in Duncan, OK

Nearest in-person tester to Duncan

The closest CARB-credentialed Clean Truck Check tester is Test & Truck, LLC in Oklahoma City, Oklahoma — about 59 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Stephens 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

35

Trucking employees

358

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

Freight corridors near Duncan

Duncan sits on US-81, OK-7 and OK-7-Spur. 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).