We address the questions of whether a flat or hump yard should be built, or perhaps more importantly, whether an existing flat yard should be rehabilitated into a hump yard. One can classify a flat yard as a labor-intensive facility, whereas a hump yard is a capital-intensive facility. For this reason, it has been traditional to build flat yards for low-volume terminals, and to build hump yards for high-volume terminals. However, this needs to be re-examined because of the rapid inflation of labor costs in the last decade and the innovation in the design of so-called “mini-hump” yards.
The Elkhart yard was analyzed using the CAPACITY model. Two types of sensitivity analysis were conducted: First, the effect of slower humping rates wa...
This report covers the work done during the development of efficient schemes of car sorting and train formation in a hump yard. Various schemes were s...
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