Intersection Geometric Design&Traffic Operation Impact Analysis Based on UAV Aerial Data
Signal controlled intersection is not only the bottleneck of road traffic,but also the accident prone area in the road network.However,the existing research on the correlation analysis between the geometric characteristics and traffic operation characteristics of different types of intersections is lack of in-depth discussion.It selects three typical intersections in Shanghai,uses UAV to take aerial photos,extracts traffic operation parameters from aerial videos,and compares the differences of geometric design parameters and vehicle operation characteristics of different intersections.The analysis results show that:the skew intersection is easy to lead to the dispersion of vehicle right turn trajectory,and the right turn trajectory radius distribution interval span is large.The turning radius of curb is too small,which also easily leads to the dispersion of the right turn trajectory of vehicles.In this paper,the turning radius is divided into three groups:small radius,medium radius and large radius.It is suggested that the design value of the turning radius of the curb at the intersection should be taken in the medium radius group(10～15 m).At the same time,the stop line at the entrance of the intersection can be moved forward appropriately to improve the traffic efficiency of the intersection.The research results can provide measured data support and reference for the geometric design and traffic organization optimization of urban road intersections.
signal control intersectionturning radiusstraight ahead vehicleright turn vehicleunmanned aerial vehicle(UAV)
NETL
NSTL
万方数据
