Driving Visual Demandbased Safety Evaluation of Mountainous Highway Horizontal Curve

Abstract:

By using EMR8B,a lot of driving experiments were conducted in the mountain roads whose radius is continuously variable.The visual demand of drivers are evaluated by eye fixation distribution index(EFDI),average deviation of horizontal visual angle(AVEDEV),eye fixation intensity and other indexes of drivers’ eye movements.The results indicate that the information that the drivers get from the highway with small horizontal curvature radius and intersection angle is more than that from other horizontal curves,and the level of the driver’s viewpoint and horizontal visual angle are not well adapted to the requirements of alignment combination variety,and for the curve with small horizontal curvature radius and intersection angle,the radius should be more than 125 m,and the road center corner should be more than 120°.