The companies will offer 6,000 free rides over Halloween weekend -- and on weekends through the end of the year -- in an effort to reduce drunk driving.
The agency also will lower speed limits in some places.
Southbound lanes of Foxhall Road in Northwest Washington were closed.
If you're still carrying a Samsung Galaxy Note 7, add all Amtrak to the list of places where your device is no longer welcome.
Virginia planners hope to begin construction in the spring.
Georgia Avenue northbound lanes are closed.
A train at Largo Town Center had equipment problems.
An RV carrying marijuana-laced candy caught fire Sunday on Delaware Memorial Bridge. Owner says $50,000 worth of product lost.
Two inspectors jumped out of the way of an oncoming train with only moments to spare.
It's a light weekend for congestion-generating events, but traffic around college football games and Metro track work may slow some trips.