M Street SE/SW is reflected in the DC Streetcar 22-Mile Priority System as the line labeled “Anacostia Initial Line-M Street-Buzzard Point.”
The District Department of Transportation (DDOT) completed a multi-modal transportation study in 2013 that identified some current and future transportation challenges of M Street SE/SW, along the Southwest waterfront from 12th Street SE to 14th Street SW and from the Southwest/Southeast Freeway south to the Anacostia River/Washington Channel. The study analyzed how to integrate transit (including streetcar), bicycling and walking with motor vehicle traffic in this growing section of the District.
More materials from that project can be found on the project website.
A formal National Environmental Policy Act (NEPA) process for M Street SE/SW will begin in 2014. Stay tuned as the project kicks off for public meeting announcements and planning materials.