His first stretch of 12.9 km with nine stations, was opened on November 21, 1983

City of Baltimore and its suburbs has 1.8 million inhabitants. The peculiarity of the City is that it is located on the shore of the bay on a peninsula overlooking the sea far away, and is the largest port in the United States and an important industrial and cultural center.

The route runs from the first-line center in the north-west direction and covers the areas with the most intensive residential development. From the end station, Charles Center Line 7.2 km long with six stations are underground station Mondolin, then 4 km along the overpass, and another 1.7 km on the ground.

The construction of a new line in a northerly direction length of 9.6 km with three stations. Plots of the line, which is scheduled to be commissioned in 1988, will be fully ground. In addition, the planned construction of the underground section of a length of 2.4 km, which will link the center with the largest medical-sports complex.

Tunnel excavation was carried out by the shield, except for those portions of the rocks, which required more sophisticated blasting. The six underground stations constructed by the closed method, since each of them is at least two levels. Two stations will be built where the hubs are located in three levels. The deepest station Pein port is located at a depth of 36.5 meters Nine stations have a length of 137 m platform stations are spacious, have their own inherent only to them, the architectural treatment of the individual, decorated with mosaics and murals.

Laying the path to the tunnel was carried out on concrete slabs with rubber pads to reduce noise and achieve greater smoothness. On the surface areas of the rails are laid on concrete bi-block sleepers, which, in turn, travel concreted in concrete blocks. Minimum radius of curves - 225 m, the maximum deviation - 30% o.

Power collection is the third rail, which is covered for better conductivity of aluminum paint. The voltage in the contact rail 700 V DC. Managing energy supply is from a single control center.

Keeping trains automatically, but for the engineer submitted information on the functions of the train, opening and closing doors, the administration of the train station and a few others.

The automatic train control, working on microprocessors, performs maintenance on the train overtake, regulates the speed and provides a stop at the station at the specified location.

Motion control is carried out from a single center, which has constant radio contact with train drivers, telephone with all the points of life underground, and television communication with the stations.

The trains are made up of six cars on the principle of dvuhvagonnyh sections. The length of the wagon - 22,9 m, width - 3,1 m, capacity - 170 seats, including 77 seats. Body of the wagon - frameless, made of corrugated stainless steel. On each side of the car there for three sliding doors with a width of 1.27 m aperture front and side windows made of colored safety glass. The cars are equipped with air conditioning and ventilation system. Motor cars have 4 traction motor power of 130 kW with thyristor control and the possibility of recovery. The maximum speed of 110 km / h

Metro operates from 5 am to 20 pm. The interval between trains of 8-10 min. Precinct speed of about 50 km / h Payment for travel, as well as a bus zone, 75 cents to 15 cents, and transplant for transplant. The stations are equipped with Change Machines Ticket turnstiles for the automatic passage of the magnetic reading. They have escalators and elevators (for disabled).