涡轮式2相位平面交叉口设计研究

Turbine Wheel Driveway of Left-turn Vehicles in Two-phase Signalized Grade Intersection

提出在可用面积较大的交叉口运用涡旋式交通组织方案。通过将左转车道移至交叉口进口道外侧和二次停车的方式,改变左转机动车在交叉口实现转向的位置,使其转化为另1个方向的直行机动车,减少左转机动车在交叉口产生冲突点,从而提高交叉口通行能力并减少延误。对交叉口涡轮式交通组织原理进行了介绍,并通过实例分析对比了进行涡轮式交通组织方案改造前后的交通效益指标。结果表明,运用涡轮式交叉口设计后,交叉口通行能力得到大大提高,车均延误明显减少。

The paper introduces a new method of intersection design,whose track of left-turn vehicles is like a turbine wheel to change the left turn vehicles into direct movement in another approach.By this way,the capacity of the intersection can be enlarged and the cycle time can be shortened.An example is also employed to reveal the traffic benefit before and after the new method is used.The results suggest that the capacity is obviously enlarged and cycle time is greatly shortened.