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Clean Truck Check Testers in Wyoming
2 CARB-credentialed testers across 1 city.
Testers in Wyoming
McCandless Truck Center Cheyenne
Mark Russell
OBD
Trucking activity in Wyoming
FMCSA MCMIS reports 4,800 active motor carriers registered with operations in Wyoming. The Clean Truck Check program reaches the heavy-duty subset that operates in California, which is why this directory exists.
Interstate carriers
3,300
Intrastate carriers
1,500
Hazmat carriers
380
Passenger carriers
80
Heavy-duty power units
22,400
Medium-duty power units
2,700
Source: FMCSA MCMIS Registration Statistics. Snapshot 2024-10-01. Last fetched 2026-05-18.