Track work will affect service on Red, Blue and Orange lines.
Work on the HOT lanes project may be less obvious, but it's six months from being done.
Power disruptions caused by Thursday's storms force service to run trains one car light Friday morning. A spokesman said evening rush hour trains will resume to regular service.
Authorities closed a center northbound lane on 14th Street NW from Constitution to Pennsylvania avenues for the fourth day while crews repair the sinkhole, D.C. police said.
Metro plans to add 60-foot buses to two of it's busiest bus corridors where riders have complained about long waits and buses so crowded they don't even stop to pick up more passengers.
Bicyclists stage peaceful protest at Washington Post over Courtland Milloy column.
Orange and Blue Line trains are single-tracking between Smithsonian and Federal Center SW. Riders should expect delays.
New York executive Ryan Simonetti says he hopes the company will learn from his experience.
D.C. police said the northbound center lane between Constitution and Pennsylvania avenues remained closed Thursday.
One site puts the station closer to residential neighborhoods; the other is closer to retail and mixed-use development.