1917 4bt Cummins White Motor Company Touring Car Conversion
The first automobiles were officially allowed into Yellowstone in 1915 (on July 31, a Ford Model T became the first to legally enter the park) and horse-drawn vehicles were prohibited by 1917. The Yellowstone Park Transportation Company (Y.P.T. Co.) was designated as the sole park transportation concessionaire and was required to buy 116 touring cars and motor buses for use in the 1917 summer season. These vehicles, like the stagecoaches, were also painted yellow and were manufactured by the White Motor Company of Cleveland, Ohio. Drivers were known as "gearjammers", and like their predecessors, the stagecoach drivers were among the best paid and most envied of concession employees.
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