Maryland trucking sits inside a four-agency regulatory framework that motor carriers operating across
the I-95 spine and the Port of Baltimore need to understand before binding the program. Interstate
authority runs through FMCSA at the federal level; state motor carrier registration runs through the
Maryland Department of Transportation Motor Vehicle Administration; insurance carriers and policy
forms are regulated by the Maryland Insurance Administration; workers compensation is administered
by the Maryland Workers’ Compensation Commission as a competitive-market system (not a state monopoly
fund).
Federal authority — FMCSA, USDOT, and PHMSA
Interstate Maryland motor carriers register with the
Federal Motor Carrier Safety Administration
for a USDOT number and motor-carrier authority, file BMC-91 or BMC-91X public-liability proof of
insurance through their carrier, and carry the MCS-90 endorsement on the auto liability policy.
Hazmat operations layer PHMSA placarding, training, and routing requirements on top of FMCSA
authority — and the Baltimore tunnel hazmat restrictions affect routing in a way the federal rules
alone do not capture.
Maryland Department of Transportation (MDOT)
MDOT
oversees the Motor Vehicle Administration (which handles motor carrier registration, IRP and IFTA
processing, and UCR administration), the State Highway Administration (which administers oversize
and overweight permits on I-95, I-70, I-83, I-68, I-97, and US-50 / US-13 across the Eastern Shore),
and the Maryland Transportation Authority (which operates the Fort McHenry Tunnel, Baltimore Harbor
Tunnel, and the bridges across the Chesapeake Bay). Heavy-haul operators running permitted loads
work directly with the State Highway Administration on routing approvals.
Maryland Insurance Administration (MIA)
MIA
regulates the property and casualty carriers that write Maryland trucking auto liability, motor
truck cargo, physical damage, trailer interchange, and pollution liability programs. Carrier
admission, rate filings, policy form approval, and consumer complaint resolution all run through
MIA. Filings carried by the insurance carrier on behalf of the motor carrier (BMC-91, BMC-91X) sit
at the federal level, but the carrier’s authority to write the policy in Maryland runs through MIA.
Maryland Workers’ Compensation Commission (WCC)
The Maryland Workers’ Compensation Commission administers the state WC system as a competitive
market. Maryland is not a state-monopoly workers compensation state — coverage is placed through
private insurance carriers, including specialty motor-carrier markets that understand interstate
trucking payrolls. Owner-operators leased under 1099 arrangements raise classification questions
that affect both workers compensation eligibility and audit exposure, and the WCC oversees the
dispute-resolution process when a classification question reaches a contested claim.