National Transportation Safety Board
A preliminary report on the train derailment in Rosedale says stop signs at a rail grade crossing were faded and displaced.
Federal officials say there was a close call between a military helicopter and a regional airliner attempting to land at Reagan National Airport near Washington on Friday.
Federal accident investigators recommended Tuesday that states cut their threshold for drunken driving by nearly half, matching a standard that has substantially reduced highway deaths in other countries.
U.S. investigators said Wednesday they asked Boeing Co. to provide a full operating history of lithium-ion batteries used in its grounded 787 Dreamliners after Japan’s All Nippon Airways revealed it had repeatedly replaced the batteries even before overheating problems surfaced.
Weeks after a deadly train crash claimed the lives of two teenage girls in Ellicott City and transportation officials reveal the derailment caused $2.2 million in damages.
The National Transportation Safety Board has released hundreds of documents in its investigation into a bus crash on Interstate 95 in Virginia that killed four people and injured dozens.
The nine people killed in a Metrorail crash in June 2009 in northeast Washington will be honored with a plaque near the crash site next month.