Performance of Typical Heavy Vehicle with Globe Position System

Abstract:

The performances of typical heavy vehicles were collected by an investigation with globe position system(GPS). The influence rules of gradient and loading situation were studied. The result shows: when the gradient is 2% and slope length is 800 meter, the speed drops of empty, fully loading and overloading heavy vehicle are 5 km·h-1, 13 km·h-1, and 20 km·h-1 respectively, the values turn out to be 5 km·h-1, 25 km·h-1, and 44 km·h-1 when the gradient is 3%. Comparison between performance curves of heavy vehicles in China and American Highway Capacity Manual shows: when the gradient is 2%, the speed of fully loading heavy vehicles in China is 10 km·h-1 lower than heavy vehicles in America while the speed of overloading heavy vehicle is slower by 30 km·h-1; when the gradient is 3%, the number is 11 and 36 km·h-1 respectively.

Key words:heavy vehicle; performance curve; passenger car equivalent; globe position system; gradient