Do Not Hump -- Train Engineer and EMD GP40 Locomotive in San Luis Obispo, California
by Darin Volpe
Title
Do Not Hump -- Train Engineer and EMD GP40 Locomotive in San Luis Obispo, California
Artist
Darin Volpe
Medium
Photograph - Photography
Description
Humping is a method of sorting railroad cars. A locomotive pushes cars to the top of a hill, where they are released to roll down the other side on their own. The track on side of the "hump" branches into several parallel tracks where the trains are made up. The car or cars can be made to roll into whichever of the parallel tracks needed so it becomes part of the right train. While quicker and more efficient that having a locomotive take each car to its appropriate train under power and returning to pick up other cars, some cars containing fragile contents, hazardous material, or otherwise require special handling may be marked with a "Do Not Hump" sign to indicate they should not be free-rolled in a hump yard.
Back in 1994, all locomotives coming through the San Luis Obispo depot weren't yet painted UP Armour Yellow. Southern Pacific was still the railroad that called the Coast Line home, and as a division of the SP, Rio Grande equipment could often be seen powering trains over Cuesta Grade.
Uploaded
September 19th, 2020
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