城市道路斜交角交叉口平面设计的几点思考

Reflections on urban road design oblique angle of intersection of the plane

本着保护环境和节约城市用地的原则,城市道路设计时对规划线形调整的余地很小,对于交角小于70°的畸形交叉口,通常采用设置导流岛的形式。导流岛的设置不仅满足交叉口视距的要求、减弱锐角交叉口的不利影响、保证行车视野、规范行车轨迹、提高交叉口通行能力,同时仅交叉口夹角小的一侧占用道路红线外用地土地,较常规改变次要道路线形的方法占地要小的多,进一步节约城市用地。

The principle of the protection of the environment and conservation of urban land use, urban road design room planning linear adjustment is small, less than 70 ° for the angle of deformity intersections, usual- ly in the form set diversion island. Set diversion Island not only meet the intersection sight distance require- ments, reduced the adverse effects of an acute angle intersections, to ensure traffic vision, specification lane track and improve intersection capacity, while only a small intersection angle occupied by the road side out- side the red line land use land, changing the secondary roads than conventional linear method covers a much smaller, more urban land conservation.