Research on optimal information threshold of long straight section on grassland highway

doi:10.16265/j.cnki.issn 1003-3033.2021.06.025

Abstract

Abstract: In order to optimize monotonous landscape environment of grassland highways and improve driving safety of drivers, simulated driving experiment method was adopted to design a two-lane second-class grassland highway based on real road information. Different information densities were set for a range of 1-5/km, 40 subjects were selected and tested for four eye movement sensitivity indices including blink duration, fixation duration, pupil diameter and saccade range. Then, variation rules of their eye movement indices under different information amount environment were quantified, a relationship model between information content and indices was established, and derivative of the conic in terms of quasi combination was taken. The results show that relationship between information amount and eye movement indices is U-shaped, and 4/km makes the optimal information threshold under which change rate of indices reaches the largest with the utmost information extracted and landscape environment will not trigger "monotony". However, when it is greater than or less than 4/km, the change rate would decrease.

Key words: grassland highway, long straight segment, information threshold, eye movement indices, driver

CLC Number:

X912

SHANG Yan, ZHU Shoulin, QI Chunhua. Research on optimal information threshold of long straight section on grassland highway[J]. China Safety Science Journal, 2021, 31(6): 189-195.

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