Government decision makers, highway departments became more aggressive in telling commuters to stay home.
The District plans to move a streetcar to H Street NE on Friday night, then begin testing before passenger service starts in 2014.
The incoming storm is likely to bring out more bad habits among D.C. travelers..
Building the lane on M Street NW is scheduled to take four to six weeks.
Travelers along the H Street/Benning Road corridor are beginning to learn about sharing the roadway with the new vehicles.
The Silver Line and the D.C. streetcar line are wrapping up construction, but still need testing.
An erosion problem detected in 2010 has worsened. The closing is scheduled to last about six months.
AIDS Walk and Howard University homecoming on Saturday, plus Sunday's Marine Corps Marathon will cause traffic diversions.
The program, called moveDC, is an effort to develop a transportation plan for the next three decades.
The District has begun mailing out the city's new Visitor Parking Passes, the latest step to make the program less subject to abuse.