A fatal NYC Metro-North Railroad crash caused by excessive speed through a curve left 4 dead and scores injured in its wake. No anomalies have been found regarding the train’s controls. The train operator, who was suspended without pay, is cooperating with investigators. Pundits across the board now believe that positive train control technology could have prevented this tragedy. PTC allows trains to slow down automatically when arriving at certain portions of track. Metrolink in Los Angeles has been installing such a system for years and plans to launch the technology in the coming months.