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.
Drivers should expect delays on southbound VA 28 in Fairfax after a fatal crash.
New bike stations open in Tysons and Reston on Friday.
Carnegie Mellon automation expert Costa Samaras talks about bringing clear eyes to the "hype cycle," making sure technology performs as advertised, and the thrilling dawn of robocars.
New route will connect Old Town Alexandria and two Metro stations to National Harbor.
The accident involved serious injuries.
Major delays on outer loop of Beltway near Wilson bridge after crash. Lanes have reopened on the Beltway.
Riders on Metro's Blue Line face delays. Trains are no longer sharing a track between the Franconia and Van Dorn Street stops.
Bowser said General Manager Paul Wiedefeld must offer specifics on how he intends to use extra track time the service cuts would provide.