Clean Truck Check Credentialed Tester

Clean Truck Check in Port Leyden, NY

1 credentialed tester in Port Leyden.

Testers in Port Leyden

Nearest in-person tester to Port Leyden

The closest CARB-credentialed Clean Truck Check tester is Roman Diakov in Middletown, New York — about 155 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Lewis 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
23
Trucking employees
64

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

Freight corridors near Port Leyden

Port Leyden sits on NY-12, NY-12D, NY-26, NY-28 and NY-46. 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 Port Leyden. Useful for routing a service stop around your CTC test.

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