Clean Truck Check Credentialed Tester

Clean Truck Check in Oshkosh, WI

1 credentialed tester in Oshkosh.

Testers in Oshkosh

Nearest in-person tester to Oshkosh

The closest CARB-credentialed Clean Truck Check tester is DOT Truck and Trailer Repair Co in Big Bend, Wisconsin — about 81 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Winnebago 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
68
Trucking employees
2,239

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

Freight corridors near Oshkosh

Oshkosh sits on I-41, US-10, US-151, US-41, US-45 and CTH-C. 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 Oshkosh. Useful for routing a service stop around your CTC test.

+4 more within 25 miles.

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