News release: “The National Transportation Safety Board issued an urgent safety recommendation to the Washington Metropolitan Area Transit Authority (WMATA) calling for enhanced safety redundancy of its train control system. A recent accident on the Metrorail’s Red Line between the Fort Totten and Takoma stations has shown that WMATA’s train control system is susceptible to a single point failure because it did not fail safe and stop a train when detection of a preceding train was lost. The urgent safety recommendation issued today calls for WMATA to evaluate track occupancy data on a real-time basis in order to detect losses in track occupancy and automatically generate alerts to prompt such actions as immediately stopping train movements or implementing appropriate speed restrictions to prevent collisions.”