Quantifying the Impacts of Right-Turn-on-Red, Exclusive Turn Lanes and Pedestrian Movements on the Efficiency of Urban Transportation Networks
Quantifying the Impacts of Right-Turn-on-Red, Exclusive Turn Lanes and Pedestrian Movements on the Efficiency of Urban Transportation Networks
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DOI：
10.1016/j.ijtst.2024.02.007
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发表时间：
2024-02
影响因子：
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通讯作者：
Hao Liu;Zecheng Xiong;V. Gayah
中科院分区：
文献类型：
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作者：
Hao Liu;Zecheng Xiong;V. Gayah
以往的研究表明，限制左转可以提高交通网络的效率。然而，这种策略可能导致右转动作的数量显著增加。虽然这些右转动作不会与对面的交通发生冲突，但它们仍然必须与相邻人行横道上的行人相互作用。此外，它们的运动受到右转红灯（RTOR）的影响，RTOR通常用于信号交叉口以提高交叉口的通行能力，并且存在专用右转车道。本文在网络层面上考察了这三个因素（行人活动、RTOR和专用右转车道）对车辆运行性能的影响。考虑简单的网格网络结构，因为它们具有普遍性，并且测试了三种网络类型的性能：允许左转的双向街道，禁止左转的双向街道和单行道。研究结果表明，在没有行人的情况下，无论是否存在专用车道，右转右转都能提高交通网络的运行性能，特别是对于限制左转运动的网络，而专用车道的存在增加了允许右转右转的效益。结果还表明，在交通负荷较轻时，允许RTPR比提供专用车道更重要；然而，在交通繁忙的情况下，专用转弯车道变得更加重要。正如预期的那样，行人的存在降低了整体网络性能和RTPR在大多数情况下提供的好处。与由单行道组成的网络相比，由双行道组成的网络的性能下降幅度更大。对于保护左转弯以保持网络效率的双行道来说，专用车道也至关重要。总的来说，在考虑到这些特征后，禁止在双向街道上左转仍然提供了所有网络中最大的运行性能。
Previous studies demonstrated that restricting left turning movements can enhance transportation network efficiency. However, this strategy can lead to significant increases in the volume of right-turn movements. While these right-turn movements do not conflict with opposing through traffic, they still must interact with pedestrians in adjacent crosswalks. Further, their movement is influenced by the presence of right-turn-on-red (RTOR), which is commonly applied at signalized intersections to improve intersection capacity, and the presence of exclusive right-turn lanes. This paper examines the influence of these three factors (pedestrian activity, RTOR, and exclusive right-turn lanes) on vehicular operational performance at a network-wide level. Simple grid network structures are considered due to their generalizability and the performances of three network types are tested: two-way streets that accommodate left turns, two-way streets that prohibit left turns, and one-way streets. The results reveal that when there are no pedestrians, right-ROTR can improve the operational performance regardless of the existence of exclusive lanes, especially for the networks restricting left-turn movements, and the presence of exclusive turn lanes increases the benefits obtained by allowing RTPR. The results also suggest that allowing RTPR is more important than providing exclusive lanes when the traffic load is light; however, under heavier traffic, exclusive turn lanes become more important. The presence of pedestrians reduces overall network performance and the benefits provided by RTPR for most scenarios, as expected. This decrease in performance is larger for networks made up of two-way streets compared to those made up of one-way streets. Exclusive lanes are also found to be critical for two-way streets with left turns protected to maintain network efficiency. Overall, prohibiting left turns on two-way streets still provides the largest operational performance of all networks with these features considered.