针对公交专用道利用率较低的问题,提出了一种公交专用道路权动态分配策略,实现公交专用道精细化管理,提升道路通行效率.在公交优先的基础上,基于道路分区控制思想,将公交停靠站间道路划分成一定数量的清空区域,通过检测器获取当前通过车辆的类型,利用可变情报板提示公交专用道的使用状态,当检测到公交车时,可变情报板提示公交专用道对外关闭.反之,当公交车未使用专用道时,可变情报板将提示其对外开放.进一步通过数值仿真与模拟对不同清空区域长度、车辆饱和度及公交发车间隔组合条件下公交车辆和其他车辆运营效果进行对比分析,最终得到能取得最佳运营效果的清空区域长度、车辆饱和度及公交发车间隔组合条件.最后以兰州市BRT为例,采用C++与Vissim-COM进行了联合仿真试验,验证分区控制方法的有效性.结果表明:车辆饱和度大于 0.4 时,清空区域长度在50～200 m时,其他车辆车均明显降低,动态公交专用道分区控制运营效果良好;饱和度在 0.4～0.6,清空间距100 m 时,其他车辆受益较大,公交车所受影响较小,实行动态公交专用道分区控制策略综合运营效益最佳.该结论对于公交专用道分时段灵活使用具有一定的现实意义,为优化道路资源利用提供了重要的理论支撑与实践参考.
Design and Applicability Analysis on Zoning Control Method for Dynamic Bus Lane
Due to the issue of underutilization in dedicated bus lanes,a dynamic allocation strategy is proposed to enhance the management of dedicated bus lanes and improve road traffic efficiency.Building upon the principles of bus priority and road zoning control,the roadway among bus stops is partitioned into distinct areas.The detector determines the type of passing vehicle,and a variable information board is employed to convey the utilization status of the dedicated bus lane.When a bus is detected,the variable information board signals the closure of the bus lane to other vehicles.Conversely,when the bus is not utilizing the dedicated lane,the variable information board indicates that it is open to the public.Moreover,numerical simulations and analyses are conducted to compare the operational effects of bus vehicles and other vehicles with various combinations of clearing area lengths,vehicle saturation and bus departure intervals.Ultimately,this analysis determines the optimal clearing area lengths,vehicle saturation thresholds and bus departure intervals that yield the most favorable operational outcomes for bus vehicles.In order to validate the practical applicability of the partition control method,a case study is conducted by using the bus rapid transit(BRT)system of Lanzhou.A joint simulation experiment is carried out by utilizing C++ and Vissim-COM,which serves to verify the effectiveness of the proposed strategy in real-world scenarios.The result shows that(1)when bus departure interval is greater than 0.4 and clearing area length is 50-200 m,other vehicles are significantly reduced,and the dynamic bus lane zoning control operation effect is good;(2)when bus departure interval is 0.4-0.6 and clearing area length is 100 m,other vehicles benefit greatly and buses are less affected.The comprehensive operation benefit of implementing the dynamic bus lane zoning control strategy is the best.The conclusion is flexible for the use of bus lanes in different time periods with a certain practical significance.
traffic engineeringdynamic bus lanejoint simulationzoning controlclearing area
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