In this scene from August 1954, GP-7 No. 5780 stops at Vanderbilt, Michigan with the southbound Timberliner, train No. 336. The Timberliner, accommodating vacationers from Detroit to Mackinaw City and Mackinac Island, operated only on summer weekends. The northbound train ran on Friday and the southbound train on Sunday. By the early 1960s passenger service on the Mackinaw City line had been discontinued north of Bay City, which was still served from Detroit by a "Beeliner," the New York Central's name for a Budd RDC (self-propelled rail diesel car) until March, 1964.