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Each train has at least one restroom in the last car of the train (the car furthest from the locomotive).

The MARC (Maryland Area Regional Commuter) Train Service is a commuter rail system that operates three lines of service that include Harford County, Maryland; Baltimore City; Washington D.C.; Brunswick, Maryland; Frederick, Maryland and Martinsburg, West Virginia.

To Baltimore/Washington International Thurgood Marshall Airport. You can take Metrorail from your nearest station to Union Station on the Red Line. From there, take the MARC train to the airport, where a shuttle takes you directly to the airport.

Board MARC Trains at Washington's Union Station located at 50 Massachusetts Avenue NE. Hours and information can be found here. The BWI Marshall Rail Station is on MARC's Penn Line. To contact the Union Station ticket office, please call 202-906-3104.

Shuttle Service operates 24 hours a day, 365 days a year. Shuttles run approximately every 10-15 minutes, except between the hours of a.m. and a.m. when service operates every 25 minutes. At the MARC/Amtrak station, shuttles stop adjacent to the rail station garage, directly across from the rail station.

MARC is an easy and efficient way to travel between Baltimore and DC. Many use the Penn Line for transport to and from BWI airport. Trains depart from Union Station and make 4 additional stops before arriving at BWI. The total length of the journey from DC to BWI is approximately 35 minutes.

The Penn Line of the MARC Train Service operates primarily between Baltimore's Penn Station, through BWI Thurgood Marshall Airport Train Station, and Union Station in Washington, D. C. Stops include Baltimore City, Odenton, and Bowie State University.