This study seeks to develop a better understanding of the physical characteristics of the national truck fleet. With a better understanding of the truck fleet, particularly some information about the truck body type, it should be possible to evaluate the relationship between body type, weights, axle spacings, and cargo carried. The primary objective of the project was to find patterns of axle spacings that correlate with body types, which can then be used to improve algorithms used by axle-based automatic vehicle classifiers and to estimate travel by body type from axle-based vehicle classification data.
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