An alternative design for traffic intersections with work zones by using pre-signals
An alternative design for traffic intersections with work zones by using pre-signals
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DOI：
10.1080/15472450.2020.1797505
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发表时间：
2020-08
影响因子：
3.6
通讯作者：
J. Zhao;K. K. Kigen-K.;Xiaomei Xia
中科院分区：
文献类型：
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作者：
J. Zhao;K. K. Kigen-K.;Xiaomei Xia
摘要匝道工作区造成的车道封闭对信号交叉口的运行效果产生了不利影响。为提高交叉口的实用能力，提出了一种带工作区的交叉口创新设计方案。在本设计中，通过使用预信号，可以在信号周期的不同时段动态地将具有工作区的路段内的车道作为进出车道。建立了最优几何布局和信号配时设计的优化模型，以捕获现实世界的运行约束，包括车道分配、主信号和预信号的信号配时、混合使用区域和过渡区域的距离以及饱和限制程度。实例研究和广泛的数值分析表明，在不同的几何布局和交通需求情况下，前瞻性设计与传统设计相比是有效的。总体而言，所提出的设计可以在不需要扩建十字路口的情况下，使带工作区的十字路口的实际通行能力增加（最多30%），并相应地减少平均车辆延误（减少50%）。结果表明，当工作区域长度小于160 m时，所提出的设计具有良好的应用前景。
Abstract The lane closures caused by the work zone at the approaches create a negative impact on the operational effectiveness of the signalized intersections. This paper presents an innovative design for intersections with work zones to improve the intersection’s practical capacity. In this design, the lanes in the leg with work zone can be used dynamically as approach and exit lanes during different periods of a signal cycle by using the pre-signal. An optimization model for an optimal geometric layout and signal timing design is built to capture real-world operational constraints, including the lane assignment, the signal timing of the main signal and pre-signal, the distance of the mixed-usage area and the transition area, and the degree of saturation restriction. A case study and extensive numerical analysis demonstrate the effectiveness of the prospective design as compared with conventional designs under different geometric layout and traffic demand situations. Overall, the proposed design can lead to an increment in the practical capacity of the intersection with a work zone (by up to 30%) and reduce the average vehicular delay accordingly (by 50%) without necessitating an expansion of the intersection. The results show that the promising application of the proposed design when the length of the work zone is less than 160 m.