
From WMATA:
“The investigation into the cause of a low-speed train collision outside Farragut West is ongoing, including analysis of railcar data recorders, control center event logs, and signal system playback.
While Metro has not yet identified the root cause of the incident, investigators have found no evidence of a signal system failure and have ruled out “loss of shunt” as a cause. Data analysis shows that all trains in the area were properly detected by the signal system, and appropriate speed commands were sent to the trains to maintain safe spacing.
The investigation is also reviewing human factors as a possible cause. Formal interviews of both train operators were conducted this morning by Metro safety investigators and Washington Metrorail Safety Commission investigators, and both operators submitted to required post-incident toxicology testing. The operators will remain out of service during the investigation.
Below is a summary of preliminary findings as of 3:30 p.m. Monday, October 7: (more…)








