Parts of the Blue, Orange, and Silver lines were shut down for eight-and-one-half hours after a train derailed before 6:00 in the morning at the Smithsonian stop near downtown Washington, DC. Although Metro hasn’t yet determined the cause of the derailment, it seems likely that the service interruption is due to poor maintenance, which has caused many other incidents. The accident also illustrates a fundamental problem with rail transit: when one train breaks down, an entire line–or, in this case, three lines–can be shut down.
Metro continued to run trains in the outer reaches of the system, but stations between Federal Center and McPherson Square–in other words, nearly all downtown stations on the Blue/Orange/Silver lines–were closed. The Red and Yellow/Green lines were unaffected, and Metro provided buses for passengers on the other lines needing to reach downtown.
By 2:30 pm, Metro had opened four of the six affected stations and ran trains on one track. Both tracks were in operation by midnight, and Metro hopes to have service completely restored this morning.