A problem with a switch is causing troubles on two Metro rail lines.
Drivers should expect big backups along eastbound I-66 in Fairfax.
The delay is yet another setback for Boeing, which had hoped the jet would be certified last month.
Pennsylvania Avenue was briefly closed between 7th and 11th streets, and 9th and 10th streets were closed at D Street.
The crash occurred near the VA-286 interchange.
The deal is slated to add hundreds of new LCD screens across the system and to pay the agency at least $325 million over the next decade.
Agency action mirrors flight restrictions put into place for other high-profile events, including the Super Bowl and World Series.
A tunnel designed to carry cyclists and runners beneath Wisconsin Avenue in downtown Bethesda has become too costly, Montgomery County says.
Further information about the incident was not immediately available.
Transit union members vote to end strike at the Cinder Bed Road Metrobus garage.