Abstract

Info

Author(s):: LIN Guibao; MA Rongguo; YAO Guangpeng; LIANG Guohua; 1. School of Highway, Chang’an University, Xi’an 710064,Shaanxi, China;2. School of Electrical and Control Engineering, Chang’an University Xi’an 710064, Shaanxi, China

Keywords:: traffic engineering; horizontal curve; raised pavement marker; setting interval; drivers visual range

Abstract:: In order to play full use of the linear raised pavement markers’ induction processe on circular curve section, drivers’ visual range during the day and vision field under the vehicle’s light at night was analyzed. Besides, to determine the change ratio of drivers’ contemplation field’s arc at daytime and visual field’s arc at nighttime based on the changing radius length of the curve was determined. Pavement markers’ setting interval on the circular curve and transition curve was calculated and corrected based on the curvature of time perception and Weber’s law. The results show that the critical curve radius of raised pavement markers’ setting interval is 700 m, setting interval is 15 m when the radius is higher than the critical radius. When less than the critical radius, the setting interval is determined based on the radius range accordingly. Both sides of pavement’s raised pavement marker should be on the same radius line based on perceptual speed. When setting interval is 15 m, it should be located at the gap’s midpoint. The setting interval on transition curve is the same as circular curve.