高速公路出口匝道平面交叉口自适应信号控制策略研究

Study on Expressway Off-ramp Adaptive Signal Control

针对沪宁高速公路G42马群互通出口匝道拥堵蔓延至高速主线上的问题,提出了基于Aimsun仿真的自适应信号控制策略。通过数据的采集、拥堵原因分析、提出缓堵策略,在关键监测点布设检测器检测速度和占有率,并实现与相连交叉口信号控制器的联动控制,达到对交叉口的自适应控制,基于仿真软件Aimsun对方案实施的效果作了评价研究,结果表明文中提出的自适应信号控制策略,可以有效地降低车辆的延误时间和排队长度,提高道路的通行能力。

To relieve the off-ramp spillover queue problem at Maqun interchange on Nanjing-Shanghai Expressway, this paper developed an adaptive traffic signal control strategy based on Aimsun traffic simulator. The queuing and congestion problem had been analyzed upon the traffic data collected at the interchange. The adaptive signal control strategy was developed with consideration of real-time spillover queue detection. The strategy was evaluated on a calibrated test-bed built with Aimsun traffic simulation. The evaluation results indicated the effectiveness of the proposed strategy in reducing delay time and queue length, reflecting the safety and efficiency improvement on the traffic operations.