The Baltimore Light RailLink network consists of a main north-south line that serves 28 of the system's 33 stops; a spur in Baltimore city that connects a single stop (Penn Station) to the main line; and two branches at the south end of the line that serve two stops apiece. Because of the track arrangement, trains can only enter the Penn Station spur from the mainline heading north and leave it heading south; there are still single-track sections north of Fairgrounds, limiting headways in that section to 15 minutes. Main Line Branch to BWI Airport Branch to Glen Burnie Penn Station line External links The MTA's Light Rail page Scott Kozel's Baltimore Light Rail pages Baltimore Light Rail Baltimore Light Rail Light Rail Baltimore Light Rail