A Max Pressure Signal Control Method of Pedestrian Crossing Considering Platoon Dispersion
To address the conflict between vehicles and pedestrians at midblock crosswalks,this study introduces a new signal control method for midblock pedestrian crossing to ensure safety while maximizing traffic efficiency.Firstly,based on vehicle speed characteristics and Robertson's platoon dispersion model,the upstream road sec-tions are regionally divided,and the traffic density of each region is predicted.Then,leveraging the advantages of the max pressure(MP)signal control method,which maximizes traffic volume output and effectively prevents queue overflow,a segmented density MP signal control model is developed.The model optimizes signal timing by minimizing the average delay of vehicles and pedestrians and limiting queue length.The model verification results under various traffic states demonstrate that the segmented density MP signal control approach can prevent queue overflow and reduce the average delay of vehicles and pedestrians.In the oversaturated traffic state,the proposed method decreased the average delay by 9.56%compared to the density MP control model.In the near-saturat-ed state,improvements are comparable to traditional adaptive control.In the unsaturated traffic state,the pro-posed method outperforms traditional adaptive control by 6.5%in delay reduction.The results demonstrate that the segmented density MP model can be efficiently and effectively applied in midblock pedestrian crossing signal control to improve traffic efficiency at midblock crosswalks.
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