Research on Reasonable Spacing of Adjacent Highway Plane Intersections

Abstract In China’s relevant specifications, the minimum spacing of plane intersections is simply defined according to the grade of highway, and the design speed of intersections and the influence of intersection geometry are not considered. In this paper, the traffic flow characteristics of road sections, the influencing factors of the intersection of road intersections and the sections between plane intersections are divided into entry points. The intersection functional zone and the length of smooth running zone are theoretically analysed. According to the influence of factors, the length of each segment is calculated separately, and the reasonable spacing index of the intersection is proposed.