NEW YORK (AP) _ The National Transportation Safety Board wants the Metro-North commuter railroad to make improvements in the wake of a December derailment that killed four people in New York City.
The recommendations issued Tuesday include inward and outward facing recorders on trains.
The NTSB says recorders are valuable tools for investigators. It says understanding what was happening inside the cab just before a crash can help prevent future accidents.
The agency also is recommending speed-limit signs at all locations where a permanent speed restriction is in place. It says Metro-North already has installed signs at four such locations, including the accident site.
The board has found that the train was traveling 82 mph on a curve with a 30 mph speed limit.
The railroad said it is closely studying the recommendations.
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