The Penn Central Transportation Company, commonly abbreviated to Penn Central, was an American Class I railroad headquartered in Philadelphia, Pennsylvania, that operated from 1968 until 1976. It was created by the 1968 merger of the Pennsylvania and New York Central railroads. The New York, New Haven & Hartford Railroad was added to the merger in 1969; by 1970, the company had filed for what was, at that time, the largest bankruptcy in U.S. history.