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Test your truck ANYWHERE in the USA, Canada or Mexico without scheduling shop visits or mobile testers.
RemoteOBDMotor Home
Clean Truck Check Testers in Maryland
6 CARB-credentialed testers across 3 cities.
Testers in Maryland
TA Aftertreatment
Donald Graff
MobileOBD
MEJIA'S TRANSPORT LLC
Jose Mejia
MobileOBDMotor Home
Kevin Holt
MobileOBD
RASHNAT Consulting
Nataraj Bhat
OBD
Timothy Holt
MobileOBD
Trucking activity in Maryland
FMCSA MCMIS reports 18,900 active motor carriers registered with operations in Maryland. The Clean Truck Check program reaches the heavy-duty subset that operates in California, which is why this directory exists.
Interstate carriers
12,700
Intrastate carriers
6,200
Hazmat carriers
900
Passenger carriers
740
Heavy-duty power units
43,200
Medium-duty power units
11,800
Source: FMCSA MCMIS Registration Statistics. Snapshot 2024-10-01. Last fetched 2026-05-18.