Abstract
In a continuous downhill section of a mountain highway, factors such as road alignment, roadside environment, and other visual characteristics will impact the slope illusion drivers experience and engage in unsafe driving behaviors. To improve the negative consequences of slope illusion and driving safety in continuous downhill sections, the effects of plant spacing, height, roadside distance, and color on driving behavior were all studied by simulating the plant landscape in a virtual environment. A driving simulator and UC-win/road software were used to conduct an indoor driving simulation experiment, and parameters such as speed and lateral position offset were used as the evaluation indices of driving stability to reflect the driver’s speed perception ability with subjective equivalent speeds. The results show that a plant landscape with appropriate plant spacing, height, roadside separation, and color is conducive to improving driving stability. Furthermore, a landscape with a height of 3 m, spacing of 10 m, roadside spacing of 0.75 m, and appropriate color matching can enhance the slope perception ability and speed perception ability of drivers, which is conducive to improving the driving safety of continuous downhill sections.
Highlights
Drivers obtain traffic information through vision, which plays a key role in the vehicle operation when driving
Drivers often develop an illusion of the true slope of the road due to the change of slope over distances. is slope illusion can cause the driver to misjudge the state of the road, resulting in an incorrect evaluation of driving speed, and increase the potential of traffic accidents
In “illusion and its application in highway alignment design,” Yuan and Cheng [1] proposed that the influence of illusion on drivers should be considered in road design and proposed for the first time to correct the visual illusion of road by using the principle of perspective view
Summary
Drivers obtain traffic information through vision, which plays a key role in the vehicle operation when driving. Due to the influence of personal, environmental, and road alignment factors, a driver’s visual perception will deviate, especially when driving on continuous downhill sections On these sections, drivers often develop an illusion of the true slope of the road due to the change of slope over distances. The specification has relevant provisions on the height, spacing, roadside distance, and color of road landscape, there is no quantitative comparison and in-depth research on the impact of different road landscape factors on drivers’ driving behavior, mental state, and attention distribution. Colorful (4) During the driving process, the subjects were verbally asked one open question by the experimenter in each scene to investigate the driver’s feelings about the current road section landscape.
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