Washington Post: Rail Agencies Told to Check Systems for Signal Failure – Federal Probe Raises Concerns Nationally: “Federal investigators issued urgent safety recommendations nationwide Tuesday about the train control system at the center of the fatal Metro crash in June. The investigators, while not officially declaring a cause for the crash, say a possible design anomaly in an automated control system could have allowed it, raising serious concerns about the safety of Metro and all other transit systems with the same technology. Investigators also raised concerns about how routine maintenance could have affected the performance of the system. Metro and other transit agencies should examine their train control systems, in cooperation with the manufacturer, to guard against further malfunctions, the agency said. The National Transportation Safety Board sent advisory letters with the recommendations to Metro, the Federal Railroad Administration, the Federal Transit Administration and Alstom Signaling, the company that makes the train protection equipment.”