The first portion of the present-day Route 495, at the entrance to the Lincoln Tunnel, was constructed in 1937 when the Lincoln Tunnel opened. In 1939, it was extended west to Route 3 and it became an eastern extension of that route. In 1952, the portion of the route west of Route 3 was opened when the New Jersey Turnpike was completed. In 1959, the road was incorporated into the Interstate Highway System and was designated as part of Interstate 495 (I-495). Since the Mid-Manhattan Expressway that would have connected the route to New York's I-495 (Long Island Expressway) was canceled, I-495 officially became New Jersey Route 495 in 1979, and the signs were changed in 1989.