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ACM TechNews
Circuit Malfunction Preceded DC Metro Crash
The replacement of an important piece of collision-prevention equipment five days before last week's fatal train crash on the Washington, D.C., Metro's Red Line did not prevent the tragedy, as the track circuit failed and the malfunction went undetected, according to investigators and transit officials. Metro rail chief Dave Kubicek said the circuit in question did not completely fail, but "fluttered" on and off so rapidly that Metro's downtown operations center would not have e...
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