城市道路交叉口小缘石转角半径下人行道切角研究

为推进城市道路设计精细化转变，提升过街安全，近几年交叉口路缘石转角半径相应减小。为解决缘石转角半径减小引发的交叉口人行道空间大幅缩小问题，首先分析了决定交叉口人行道空间的三大因素，即通行空间、绿化空间与红灯等候空间。然后选取北京市典型交叉口，确定等候空间范围。最后考虑不同等级道路的红线切角大小，给出不同缘石转角半径情况下，人行道切角后退距离。得出结论：当缘石转角半径为5 m和8 m，人行道切角后退距离分别为5 m与3 m时，可以同时满足等候空间、通行空间及绿化空间要求。

Research on Sidewalk Corner Cutting under Small Curb Corner Radii at Urban Road Intersections

In order to promote the refined transformation of urban road design and improve the street crossing safety, the turning radius of curbs at intersections has been correspondingly reduced in recent years. To address the significant reduction in sidewalk space at intersections caused by the reduction of curb corner radius, three major factors determining the sidewalk space at intersection are firstly analyzed, such as the traffic space, green space and red light waiting space. Then, a typical intersection in Beijing is selected to determine the waiting space range. Finally, by considering the size of the red line corner cutting of different levels of roads, the distance for the sidewalk corner cutting to retreat under different curb corner radii is given. The conclusion is that when the radius of the curb corner is 5 m and 8 m, and the distance of the sidewalk corner cutting to retreat is 5 m and 3 m, the requirements for waiting space, traffic space and green space can be met simultaneously.