Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The BWI Marshall Airport station is one of the two southern termini of the Baltimore Light Rail. As the name implies, the station serves Baltimore-Washington International Thurgood Marshall Airport; the station platforms are just outside an entrance to the International Concourse on the lower level. The station opened in 1997, with trains then serving the station every 34 minutes and operating to Penn Station. The system's routes and schedules have changed over the years; as of 2010[update], trains depart for Hunt Valley every twenty minutes during peak commuter hours and every half hour at other times.