 During the afternoon rush hour of June 22 , 2009 , a subway train @-@ on @-@ train collision occurred between two southbound Red Line Washington Metro trains in Northeast , Washington , D.C. , United States . A moving train collided with a train stopped ahead of it ; the train operator and eight passengers were killed , making it the deadliest crash in the history of the Washington Metro . Several survivors were trapped for hours , and approximately 80 were injured . 
