DYNAMIC LANE-USE MANAGEMENT AT ISOLATED INTERSECTIONS WITH DEMAND RESPONSIVE SIGNAL CONTROL
DYNAMIC LANE-USE MANAGEMENT AT ISOLATED INTERSECTIONS WITH DEMAND RESPONSIVE SIGNAL CONTROL
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在城市地区，高峰时段交通需求的波动通常会导致交通拥堵，特别是在信号交叉口。然而，这种拥堵似乎是可以避免的，因为只有少数方向在十字路口过饱和，而其他方向通常远未饱和。当波动较小时，可以采用需求响应信号控制策略来解决这一问题。但有时当波动较大时，仅仅改变信号控制策略并不能达到预期的效果。为了降低交通拥堵的风险，更好地利用道路设施的容量，本文提出了一种将孤立交叉口的动态车道使用和需求响应信号控制策略相结合的解决方案。建立了一个可编程的车道使用和信号授时集成模型，并进行了求解。最后通过微观仿真对模型进行了验证。仿真结果表明，该模型是有效的，特别是对于一些仅通过修改信号配时对交通运行改善不大的“潮交通”情况。
In urban areas, the fluctuation of traffic demand at peak hours usually results in traffic congestions, especially at signalized intersections. However, it seems that this kind of congestions can be avoided because only a few directions are oversaturated at the intersection, and others are usually far from saturated. When the fluctuation is small, the problem can be solved by using a demand responsive signal control strategy. But sometimes when the fluctuation is big, only changing the signal control strategy will not work as well as expected. In this paper, a new solution that combines the dynamic lane-use and demand responsive signal control strategy of an isolated intersection is proposed to decrease the risk of traffic congestion and make better use of the capacity of road facilities. A programmable integrative model of lane-use and signal timing is built and solved. A case study is given with microscopic simulation to validate the model. The simulation results show that the proposed model is effective, especially for some “tide traffic” cases whose traffic operation will have little improvement by only modifying the signal timings.