长距离干道混合车流路径分割与绿波协调同步优化

Synchronous Optimization of Path Partition and Green-band Coordination for Mixed Traffic at Long-distance Arterials

摘要:

城市长距离交通干道中，小汽车和公交车的运行轨迹存在显著差异，合理的信号协调控制策略应统筹考虑两类车型的需求。针对包含大流量公交车的长距离干线绿波协调路口传统分组片面化的问题，分析了带有公交站台的长距离干道上小汽车和公交车时空轨迹特征，提出了差异化路口分组的信号协调方法。该方法将小汽车和公交车的协调路径分割点分别设置在路口和公交站点，构建了两类车型干道行驶的延误和等候时间最小化运筹学模型。实际路网的仿真证明：针对中山市中山路13个灯控路口，提出的长路径差异化分段协调较Multiband模型，其小汽车和公交车平均延误分别减少34.7%和13.7%，平均停车次数减少28.7%和30.0%。此外，针对饱和度、公共周期和公交停站时间3个关键指标的敏感性分析实验同样证明，提出的方法能同时为长距离走廊上的小汽车和公交车提供协调服务。

Abstract:

There are significant difference between car trajectories and bus ones at urban long-distance arterials， and so the signal coordination strategy should take it into account to balance the progression needs of both vehicles. Such as to tackle with the problem of signalized intersection grouping at the long arterial with high-demand bus vehicles， this paper analyzed the temporal and spatial trajectory characteristics of cars and buses along the arterial with bus stops and presented a new signal coordination based on differential intersection group partition. The proposed model set the coordinated breaking points of car and bus trajectories at intersections and bus stops， respectively， and built a mixed integer linear programming model to minimize the weighted summation of delay and waiting time for car-users and bus passengers. In simulation tests that used the field arterial of having 13 signalized intersections from Zhongshan， compared with Multiband， the developed model can reduce the average vehicle delay of cars and buses by 34.7% and 13.7%， and the number of average stops by 28.7% and 30.0%， respectively. Further exploration with simulation experiments for sensitivity analysis on saturation， common cycle length and bus dwelling time found that the developed method can provide the synchronous progression for cars and buses on the long arterial.