高速公路关联施工区可变限速协调控制方法

Coordinated Control Method of Variable Speed Limits for Correlative Work Zones of Freeway

为改善高速公路施工区交通拥堵问题,分析了高速公路关联施工区进行可变限速协调控制的必要性,确定了施工区关联度的量化计算模型,提出了关联施工区可变限速协调控制流程,运用模型预测控制方法,建立了关联施工区可变限速协调控制方法和模型.针对一条包含两个施工区的高速公路施工路段进行了仿真实验.结果表明,与固定限速相比,施工区单独控制方式下路段平均车速、车辆总行驶距离分别提高了8.5%和9.7%,而施工区协调控制方式下路段平均车速、车辆总行驶距离则分别提高了15.2%和17.3%.

In order to alleviate the traffic congestion in freeway work zones,the necessity to implement coordinated control of variable speed limits for correlative freeway work zones was analyzed,the calculation model for correlation degree of related work zones was determined,and the coordinated control flow of variable speed limits for correlative work zones was proposed.Using the model predictive control method,the coordinated control method and model of variable speed limits for correlative work zones were established.A freeway section with two work zones was chosen to carry out the simulation experiment,and the results show that,comparing with the fixed speed limits,the average speed and the total travel distance increased by 8.5% and 9.7%respectively under independent control of work zones,while the results are 15.2% and 17.3%respectively under coordinated control of work zones.