The Demand of Specific Power for Trucks Operation Safety on The Uphill Section of Expressway

In this paper, the vehicle dynamics simulation software Trucksim was used to build road models and truck models to test the driving speed and climbing distance of 6-axis trucks under different conditions. By comparing with the correlation of the maximum slope length in the "Road Route Design Specification" (JTG D20-2017), we determine the demand of specific power for trucks on expressways with different design speeds. The results show that the initial speed, specific power and slope of the road affect the maximum slope length of the vehicle. The maximum slope length increases with the increase of the initial speed and the specific power of the vehicle and it decreases with the degree of longitudinal slope increases. The Demand of Specific power for trucks on China's expressways increase with the decrease in design speed, which is 7.0kW/t (120km/h), 8.0kW/t (100km/h), and 9.0kW/t (80km/h) respectively.