THE RESEARCH ON THE STRAIGHT-LINE LENGTH OF PRAIRLE HIGHWAY BASED ON HUMAN VISUAL CHARACTERISTICS

WU Shi-yue;ZHU Shou-lin;QI Chun-hua;GAO Ming-xing;ZHANG De-hu;College of Energy and Traffic Engineering,Inner Mongolia Agricultural University;College of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University;

Straight line length;;driving safety;;eye movement

Because prairie highway has some characteristics,such as low longitudinal slope,long curve radius,many long straight lines,small alignment change,and monotonous landscape etc. Therefore drivers will be easy to cause driving fatigue in the process of driving. The researches on drivers' visual characteristic have rarely been reported in the prairie road. By real driving test in grassland highway of the Inner Mongolia,The drivers' pupil area change and the blink continuous time change in the different length of straight-line road have been analyzed. The research results indicates that if the straight-line is too long so that the drivers will be easy to cause fatigue in the prairie road,it is concluded that drivers' pupil area showed such a trend that pupil area gets larger at first,then it gets smaller with increase of the straight-line length,and the blink continuous time change longer,so it is easier for drivers to present state of fatigue which will provide theoretical basis for principle and methods to prairie highway alignment design.