Transportation economics and pricing are driven by multiple factors that influence rates. The primary factors are distance, weight, and density. These important factors are discussed from a shipper’s perspective.
Economy of Distance
Distance is a major influence on transportation cost since it
directly contributes to variable expense, such as labor, fuel, and maintenance .The
general relationship between distance and transportation cost. Two important
points are illustrated. First, the cost curve does not begin at zero because
there are fixed costs associated with shipment pickup and delivery regardless
of distance. Second, the cost curve increases at a decreasing rate as a
function of distance. This characteristic is known as the tapering principle.
Economy of Weight
A second factor is shipment weight. Similar to other logistics
activities, scale economies exist for most transportation movements. This
relationship , indicates that transport cost per unit of weight decreases as
load size increases. This occurs because the fixed costs of pickup, delivery,
and administration are spread over incremental weight. This relationship is
limited by the size of the transportation vehicle. The managerial implication
is that small loads should be consolidated into larger loads to maximize scale
economies.
Economy
of Density
A third factor is product density. Density is the combination of
weight and volume. Weight and volume are important since transportation cost
for any movement is usually quoted in ringgit Malaysia per unit of weight.
Transport charges are commonly quoted per hundredweight (CWT). In terms of
weight and volume, vehicles are typically more constrained by cubic capacity
than by weight. Higher-density products allow fixed transport cost to be spread
across more weight. As a result, higher density products are typically assessed
lower transport cost per unit of weigh. The relationship of declining
transportation cost per unit of weight as product density increases. In
general, traffic managers seek to improve product density so that trailer cubic
capacity can be fully utilized.
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