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首页> 外文期刊>Journal of Transportation Engineering >Reexamining Pedestrian Crossing Warrants based on Vehicular Delay at Urban Arterial Midblock Sections under Mixed Traffic Conditions
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Reexamining Pedestrian Crossing Warrants based on Vehicular Delay at Urban Arterial Midblock Sections under Mixed Traffic Conditions

机译：基于在混合交通条件下的城市动脉中间块部分的车辆延迟重新审视行人横梁认股权证

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摘要

Pedestrian crossing activity at unmarked crosswalks on urban roads in developing countries like India is a common phenomenon. Pedestrians used to cross the road at their place of interest to access residential and commercial land use. Such crossing operations cause a twofold effect: first the pedestrian put themselves at high risk of collision with the moving traffic, and they also affect the normal traffic operations, which causes excessive delay to vehicular traffic. Available pedestrian crossing warrants (PCWs) based on PV2 (where P is the volume of crossing pedestrians per hour and V is per-hourly traffic volume) focus on the safe movement of pedestrians, but traffic operation is least considered in such warrants. The present study deals with the development of pedestrian crossing facility warrants based on pedestrian safe movement along with vehicular delay, which includes traffic efficiency as well. The traffic data collected from four different locations through the videographic survey were used for evaluating the delay for the individual vehicle due to pedestrian crossing activity. The delay thus evaluated was further validated using the probe vehicle data collected during the same observation period. The vehicle was fitted with the GPS-based performance box instrument that provides the vehicle trajectory at any instance. A significant number of sample data were collected with the probe vehicle and delay was determined using trajectory data. The finding of the delay obtained from the field data was validated incorporating a simulation-based analysis to resemble the interaction of pedestrian flow dynamics with vehicular flows. The crossing behavior of pedestrians was simulated using microscopic simulation software VISSIM. The microsimulation model was first calibrated and validated for field traffic conditions. The total delay was assessed for the traffic stream, and it was found to follow a second-degree polynomial relationship with PV2 values. The clustering analysis was carried out using K-means clustering to define a threshold value for pedestrian crossing facilities. These warrants were also identified based on PV2 utilizing the relationship between total delay and PV2 values. The results of the present study will be useful for practicing engineers for designing pedestrian crossing facilities considering pedestrian safety and vehicular operation as well.
机译：在印度等发展中国家的城市道路上的无标记人行横道上的行人横穿活动是一种常见的现象。步行者曾经在他们兴趣的地方过马路，以获得住宅和商业用地。这种交叉操作导致双重效果：首先，行人将自己与移动流量碰撞的高风险，并且它们也影响正常的交通运营，这导致车辆流量过度延迟。基于PV2的可用行人交叉权证（PCW）（其中P是每小时交叉行人的体积，v是每小时交通量）专注于行人的安全运动，但在此类认股权证中最少考虑交通运营。本研究涉及基于行人安全运动以及车辆延迟的行人过境设施认股权证的发展，包括交通效率。通过摄像机调查从四个不同地点收集的交通数据用于评估由于行人过境活动而对各个车辆的延迟进行评估。因此，使用在相同观察期间收集的探针车辆数据进一步验证如此评价的延迟。该车辆配有基于GPS的性能盒仪器，可在任何情况下提供车辆轨迹。使用探针车辆收集大量样本数据，并使用轨迹数据确定延迟。验证了从现场数据获得的延迟结合了基于模拟的分析，以类似于行人流动动态与车辆流动的交互。使用微观模拟软件Vissim模拟行人的交叉行为。首次校准微仿模型并验证用于现场交通状况。对交通流量评估总延迟，发现它与PV2值遵循二级多项式关系。使用K-means聚类进行聚类分析，以限定行人过境设施的阈值。还基于PV2来识别这些认股权证，利用总延迟和PV2值之间的关系。本研究的结果将用于练习工程师，用于考虑行人安全和车辆操作的行人过境设施。

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