Clean Truck Check Credentialed Tester

Clean Truck Check in Madison, SD

1 credentialed tester in Madison.

Testers in Madison

Nearest in-person tester to Madison

The closest CARB-credentialed Clean Truck Check tester is Dakota Carriers in Sioux Falls, South Dakota — about 31 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Lake 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
9
Trucking employees
36

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

Freight corridors near Madison

Madison sits on US-81, SD-19 and SD-34. 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 Madison. Useful for routing a service stop around your CTC test.

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