Maryland Transportation Authority

Governor Harry W. Nice Memorial Bridge, which carries US 301 across the Potomac River between Charles County, Maryland, and King George County, Virginia

John F. Kennedy Memorial Highway, the 50-mile (80 km) section of I-95 that traverses northeastern Maryland from the Baltimore city line to the Delaware state line

Fort McHenry Tunnel, which carries I-95 under the Baltimore Harbor

Baltimore Harbor Tunnel, which carries I-895 under the Baltimore Harbor

Maryland Route 200, the Intercounty Connector

Although the John F. Kennedy Memorial Highway is referred to as a toll road, tolls are only collected at a gantry located a mile north of the Millard E. Tydings Memorial Bridge over the Susquehanna River, for northbound traffic only. Vehicles that do not traverse this section, and all southbound vehicles, do not pay a toll.

In September 2017, Governor Larry Hogan announced a plan to widen the Baltimore-Washington Parkway by four lanes, adding express toll lanes to the median, as part of a $9 billion proposal to widen roads in Maryland. The project would be a public-private partnership with private companies responsible for constructing, operating, and maintaining the lanes. As part of the proposal, the portion of the parkway owned by the National Park Service would be transferred to the Maryland Transportation Authority.

Intercounty Connector

Maryland Route 200, the Intercounty Connector (ICC), links areas of Montgomery County and Prince George's County between Interstate 370 at Shady Grove and Interstate 95 in Laurel with an 18 mi (29.0 km) east–west limited-access highway. The $2.4 billion project was financed by MDTA, with the Maryland State Highway Administration serving as the project manager for engineering and construction.

When the first segment of the ICC opened on February 23, 2011, it became the first toll facility in Maryland with fully automated toll collection. Connecting Interstate 370 with Maryland Route 97, the first segment is 5.65 miles (9.09 km) long.

Express toll lanes

The MDTA began construction of the I-95 express toll lanes on a congested portion of Interstate 95, north of Downtown Baltimore, in May 2005. Now completed, the new toll system extends for 8 mi (12.9 km), from the east side of Baltimore City, at the I-895 split, into Baltimore County, north of Maryland Route 43 in White Marsh. This segment of the John F. Kennedy Memorial Highway (Interstate 95) has two Express Toll and four general purpose lanes in each direction. Tolls for using the Express Toll lanes vary, depending on traffic conditions, to reduce congestion. The general purpose lanes continue to operate toll-free.

Other facilities

The MDTA has owned the Canton Railroad, which operates as a for-profit enterprise, since 1987.