Safety Performance Evaluation Method of Horizontal Curve on Freeway Based on Driving Workload
نویسندگان
چکیده
Evaluating the horizontal curve indices performance of freeways is important to developing an understanding of impact to driver safety and comfort. Based on the well-established theory and measurement of driving workload, typical vehicles (include passenger car and truck) were chosen for field driving test with randomly samples of 28 driver. In this research we analyzed the 652 horizontal curve sections being selected on road section with r (radius of horizontal curve) ranging from 125~1400m and i (longitudinal slope) ranging from -6~6%. Using a multiple regression model we established that there is a measurable and statistically significant increase in driving workload degree as horizontal curve radius decreases. We believe that we have developed a model that takes into account driving workload and horizontal curve indices of mountainous freeway with the applicability to designs and managements.
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