Part three of my mass transit series.Just like the orange line, the purple line uses existing tracks. This time it stays on the same set of tracks throughout its entire length. It uses the MARC Penn line and will have additional stops that are exclusive to the purple line. Like the orange line, the purple line will utilize new "pulloff" tracks for Amtrak and MARC trains won't be slowed up by purple line trains. Now here's your new purple line. It will from BWI/Thurgood Marshall Airport to Martin State Airport.
