D.C. train probe finds flaw in control system
The Wall Street Journal
Federal investigators here found an anomaly in circuits near the site of Monday's deadly train collision, suggesting a failure in Metrorail's automated-control network might have caused the crash. National Transportation Safety Board member Deborah Hersman disclosed the finding Wednesday as investigators continued to scour the scene for clues. She said five of six circuits running between the Takoma and Fort Totten stations in northeast Washington were working well, but tests on a 740-foot-long circuit showed "anomalies" that could be consistent with some kind of failure.
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