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To forecast a truck’s operating speed along upgrade sections on freeways more reasonably, a vehicle performance model (VPM) was proposed that can be used in both China and the U.S. based on vehicle dynamics. The VPM considered the effects of tractive effort, aerodynamics, grade, and rolling resistance when the vehicle was climbing along the upgrade sections. Then, according to Survey and Statistics of Chinese Freeway Transportation Volume (CFTV), a calculated typical truck (CTT) in China was selected. Last, using data collected in the G6 Jingzang Expressway Hohhot to Jining Section, the VPM was demonstrated. The results show that the VPM can predict the operating speed of a truck along upgrade sections on freeways in China. The absolute error of the VPM is less than 5%, with high accuracy. Similarly, the authors can get the current typical truck in China with a weight-to-power ratio (WPR) of 141 kg/kw and 198kg/kw.

This paper was sponsored by TRB committee ANB70 Standing Committee on Truck and Bus Safety.

18-02579

English

14p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References; Tables

Field tests; Freeways; Mathematical models; Mathematical prediction; Motor vehicle dynamics; Operating speed; Power; Speed measurement; Trucks; Upgrades (Roads); Vehicle performance; Vehicle weight

China

Highways; Planning and Forecasting; Vehicles and Equipment

Transportation Research Board Annual Meeting 2018 Paper #18-02579

TRIS, TRB, ATRI

Jan 8 2018 10:37AM