One of our favorite parts of this online exhibit of the history of Metrorail designed by historian Zachary Schrag is the ‘future of Metro’ section, which includes the image to the left. The design is by one of Metro’s original station architects, Stanley Allan, who imagines a circular line around the beltway and an entirely new Purple Line, among other additions.

Back in the real world, officials broke ground last fall on the Anacostia Corridor Demonstration Project, which will build a “modern streetcar” system to Anacostia. The Anacostia project, which planners hope to open in 2006, is part of a larger plan which would re-construct a streetcar system in the District we reported on back in September. Where do you think Metro should expand?