Drivers towing boats, campers, utility trailers and other equipment on Maryland toll roads will face new license plate enforcement rules beginning Jan. 1, under legislation passed earlier this year.
The Maryland Transportation Authority will begin using images of rear license plates on trailers and semitrailers to collect tolls when cameras cannot capture the license plate of the vehicle towing them.
The change does not create a new toll or require motorists to pay twice for the same trip, according to the MDTA. Existing toll rates, which are based on the number of vehicle axles, will remain unchanged.
Previously, the agency could not assess tolls using trailer license plates because trailers are not motorized or self-propelled vehicles.
The new law, approved during Maryland's 2026 legislative session, allows the MDTA to bill the registered owner of a trailer or semitrailer, classified as a Class G vehicle, only when the towing vehicle's license plate cannot be captured.
The change applies to a variety of trailers, including those used to transport landscaping supplies, boats, jet skis, recreational vehicles, horses and farm equipment. Flatbed, dump and utility trailers are also covered.
"If you tow a trailer on Maryland toll roads whether for work or recreation, now is the time to sign up for E-ZPass to avoid the higher video toll rates or civil penalties," MDTA Executive Director Bruce Gartner said.
Gartner urged E-ZPass customers to add both their vehicle and trailer license plates to their DriveEzMD accounts, properly mount their transponders and ensure their accounts have sufficient funds before traveling.
Drivers without an E-ZPass or Pay-by-Plate account will receive a Notice of Toll Due by mail. Toll cameras photograph license plates, and the state sends notices to registered owners using motor vehicle records.
E-ZPass customers generally pay lower toll rates than video toll customers and may qualify for additional discounts. Maryland residents can obtain an E-ZPass transponder at no charge.
Drivers can sign up for E-ZPass or review the MDTA's frequently asked questions about the new trailer toll law for additional information.
The MDTA operates Maryland's toll bridges, tunnels and highways, funding its operations and projects through toll revenue rather than state gas taxes or motor vehicle fees.
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