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平面交叉口右转车与行人时空布局优化研究

Research on Space-time Layout Optimization of Right-turning Vehicles and Pedestrians at Level Intersection

  • 摘要: 为研究交叉口处右转车辆与行人之间的冲突,合理布局让行标志设施,通过对右转车与行人的交通方式进行划分,从时空角度对交叉口处右转车辆与行人的冲突特性进行分析,时间方面利用红灯允许右转(RTOR)和允许右转相位(PPRT)2种模式下的冲突概率从而确定冲突数;空间方面利用信息效益最大化模型致使驱动程序获得更多的信息效益。研究结果表明,PPRT模式下的冲突评价指标明显高于RTOR,冲突数要低于RTOR,最大信息效益模型通过遗传算法输出结果为011001,适应度为2.75×10~4,高于未渠化的交叉口。该研究表明,交叉口处采用右转相位和交通岛渠化能够有效减少右转车与行人的冲突,同时让行标志的优化设置可为驾驶员是否采取减速措施提供更多信息。

     

    Abstract: In order to study the conflict between right-turning vehicles and pedestrians at the intersection, and reasonably arrange the yield sign facilities, by dividing the traffic modes of right-turning vehicles and pedestrians, the conflict characteristics of right-turning vehicles and pedestrians at the intersection are analyzed from the perspective of time and space. In the analysis, the collision probability in the two modes of RTOR and PPRT is used to determine the number of collisions in time; the information efficiency maximization model is used in space to make the driver obtain more information efficiency. The research results show that the conflict evaluation index under the PPRT model is significantly higher than that of the RTOR model, and the number of conflicts is lower than that of the RTOR model. The output result of the maximum information benefit model through genetic algorithm is 011001, and the fitness is 2.75×10~4, which is higher than that of the uncanalized intersection. The above results show that the right-turn phase and traffic islanding at the intersection can effectively reduce the conflict between right-turn vehicles and pedestrians, and the optimal setting of the yield sign can provide more information for drivers to take deceleration measures.

     

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