I’m working on a series about the controversial 11th Street bridge project and its impact on the DC region. To illustrate various proposals, I’ve created this diagram of the major highway routes between Greenbelt/New Carrollton and Springfield via DC and Arlington.

Click to enlarge.

Comments welcome. In particular, please let me know if anything is incorrect, including the numbers of lanes (designated by the numbers with arrows). The complex interchanges on the Beltway and the Parkway are mostly stylized; the specifics of the interchanges isn’t relevant to the traffic analysis.

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Tagged: 11th street bridges, center leg freeway, dc, new york avenue, roads, sesw freeway

David Alpert created Greater Greater Washington in 2008 and was its executive director until 2020. He formerly worked in tech and has lived in the Boston, San Francisco Bay, and New York metro areas in addition to Washington, DC. He lives with his wife and two children in Dupont Circle.