Modeling Speed Profiles of Turning Vehicles at Signalized Intersections
Modeling Speed Profiles of Turning Vehicles at Signalized Intersections
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发表时间：
2011
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通讯作者：
Axel Wolfermann;Wael K. M. Alhajyaseen;Hideki Nakamura
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作者：
Axel Wolfermann;Wael K. M. Alhajyaseen;Hideki Nakamura
在信号交叉口的安全评估和改进方面，转弯车辆需要特别注意。到目前为止，交叉口的安全评价主要是基于单个事故和冲突分析。未来有可能用微观模拟来补充这些分析。朝着这个方向迈出的重要一步是对转弯车辆的速度曲线进行建模。对于规划阶段的冲突分析，必须预测这些具有随机性的速度剖面，以评估不同的交叉口布局和信号设置及其对冲突可能性和严重程度的影响。利用日本信号交叉口采集的车辆轨迹经验数据，建立了一个模型，该模型提供了自由行驶的左、右转车辆的随机速度分布。速度分布对交叉口布置以及车辆在开始和结束动作时的速度和位置都很敏感。该模型可以通过反映行人、交通信号和其他车辆的反应的模型来补充，这超出了本文的范围，为生成转弯车辆的速度剖面提供了一个通用的框架。
Turning vehicles need special attention in the context of the safety evaluation and improvement of signalized intersections. So far the safety assessment of intersections is mainly based on individual accident and conflict analyses. It might be possible in the future to complement these analyses with microscopic simulations. An important step into this direction is the modeling of speed profiles of turning vehicles. For a conflict analysis at the planning stage, these speed profiles with their stochastic character have to be predicted to assess different intersection layouts and signal settings and their impact on the likelihood and severity of conflicts. By using empirical data of vehicle trajectories collected at signalized intersections in Japan, a model is developed and presented, which provides stochastic speed profiles of free-flowing left- and right-turning vehicles. The speed profiles are sensitive to intersection layout and the vehicle speed and position at the beginning and ending of the maneuver. This model can be complemented by models reflecting the reaction to pedestrians, traffic signals, and other vehicles, which are beyond the scope of this paper, to provide a general framework for the generation of speed profiles of turning vehicles.