Truck Count

For a given load spectrum, the ratio between the number of axle groups applied and the number of trucks applied (i.e., truck count) is assumed to be a constant. This ratio is referred to as axle groups per truck (AGPT). CalME uses AGPT to show the truck traffic volume once the axle group count has been determined using TI and load spectrum.

Note: Both AGPT and load spectrum depend on truck composition (i.e., the proportions of trucks in different classifications). In addition, load spectrum depends on the distribution of axle loads. Theoretically it is possible to have two locations that have similar load spectra but significantly different AGPT, or vice versa. Therefore it is necessary to keep in mind that the truck count shown in CalME is a rough estimate and may not be accurate.