MARC is
The Maryland Area Regional Commuter (MARC). It operates three lines that include Maryland, Washington D.C., and West Virginia. MARC Train operates on weekdays only with limited service on select holidays. For the Brunswick and Camden Line, there is morning and evening rush hours only. For the Penn Line there is all day and late evening service.
Source:
www.mtamaryland.com/services/marc/serviceInformation/MARC_General_Information.cfm
