Aiming at the unreasonable problem of the gentle slope section of the mountainous highway, the six-axis articulated train is selected as the design vehicle. The speed reduction of 20km/h is selected as the defining condition and the expected slope length of continuous long and steep longitudinal slope is defined. Taking speed deviation is selected as the safety index, and the two longitudinal slope models of "steep, gentle and steep" longitudinal slope and single longitudinal slope were established respectively, then the effects of two linear combination schemes on the climbing performance of trucks with different load ratios were simulated. The result shows that the gentle slope section can play a vital role in mitigating speed in anterior segment of the journey. When the slope is large, the gentle slope can play the recovery speed in middle and posterior segment of the journey. When the gradient is less than 3%, the speed recovery effect of the gentle slope is limited.

CICTP