Research On Intersection Angle

With the improvement of Chinese transportation industry,the total demand and total mileage of roads are also increasing.Due to the continuous improvement of the national economy,people have further demand for road service level,it is required to put forward higher expectations for the current service awareness and safety of the highway while meeting the traffic demand.At the intersection of highways and planes,because the traffic flows in each direction are merged into each other,the traffic volume at the intersection is obviously increased,and there are many conflict points that often become frequent occurrences of traffic accidents.Therefore,a reasonable plane intersection design plays an irreplaceable role in traffic safety.The intersection angle,as an important geometric element,plays an important role in the design of plane intersection.Therefore,the intersection angle of plane intersections was studied as a research object.This paper analyzes the intersection angle and intersection area of plane intersections,and establishes a related calculation model based on it.Through the analysis of the functional relational expression,the influence of the intersection angle on the cross-sectional area is clear,and the “threshold value” of the crossover area’s influence on the cross-over area is further obtained,and the range of the relatively reasonable plane intersection crossover angle is given.According to the influence of the angle of intersection on the distance of sight,from a safety point of view,considering that the turning vehicle crosses at an acute angle,the sight distance is poor,which causes the driver to feel a sense of tension and thus reduces the speed of the vehicle,and further actions such as turning the head or turning the eyeball are performed.Observe the traffic condition of the plane crossing,simulate this process through the eye tracker and the simulation driving experiment,and get the influence of the crossing angle on the behavior of the driver.Under different vehicle speed conditions,there will be differences in the horizon range.In this case,the influence of the angle of the driver’s turning head should be considered,and the relationship between the crossing angle and the viewing distance should be further analyzed.Using VISSIM simulation technology,the delay time corresponding to different angles of cross-over is simulated under the corresponding traffic volume in the direction of turning.The research in this paper provides a theoretical basis for the research on the intersection angles of plane intersections in the existing specifications and has certain practical significance.