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BOSTON — Federal investigators at the site of a fatal commuter-train crash checked trackside signals Thursday as well as reports that the trolley driver who was killed may have been on a cellphone. Terrese Edmonds was killed and more than a dozen passengers were hurt Wednesday when the two-car train Edmonds was operating rammed the back of another train in suburban Newton.
National Transportation Safety Board member Kitty Higgins said the signals were being examined because the trains are run manually and guided by so-called wayside signals.
