Effect of Signal Coordination on the Traffic Operation of Urban Corridor

Q3 Environmental Science
Zainab Ahmed Alkaissi
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引用次数: 1

Abstract

The severity of traffic congestion has increased in Baghdad city and influenced the public’s perception of the community. Extended travel time is experienced by users of the urban street system, so optimal traffic operation with a coordinated traffic signal system becomes necessary. Also, it is needed to alleviate congestion and progress traffic movement along the urban corridor. This study aims to evaluate and optimize traffic signal timing for selected intersections on Palestine arterial corridor and apply the coordinated signal system to reduce the users’ travel time on the selected urban corridor. Analyzing and evaluating congested signalized intersections using Synchro (ver.9) (Al-Nakhala intersection, Al-Sakhra intersection, and Beirut intersection) were performed. Also, their adopted strategies for improving traffic performance and reducing delays were provided. The overall assessment in terms of the level of service for the current traffic states is (LOS F) with an average control delay of (197.2, 166.8, and 262.3) sec/veh. for the Al-Nakhala, Al-Sakhra, and Beirut intersections respectively. The queue length appears after two cycles, becoming more severe congestion at intersections under oversaturated traffic conditions. The performance operation efficiency improved by reducing the control delay from (197.2 to 88) sec/veh, (166.8 to 46) sec/veh, and (262.3 to 76) sec/veh for the Al-Nakhala, Al-Sakhra, and Beirut intersections respectively. Even at high volume and oversaturated conditions, the blocked intersections were effectively alleviated. Finally, it was observed that the proposed signal coordination, built on standard actuated control significantly performed along the urban corridor, reducing vehicles’ delay. However, there are still concerns regarding the flow-to-capacity ratio (v/c ratio is still greater than 1), and the level of service is still in poor conditions (LOS E) for Beirut and (LOS F) for Al-Nakhala intersections. The application of signal coordination improved traffic progression by reducing travel time, and vehicle delay and alleviating blocked intersections.
信号协调对城市廊道交通运行的影响
巴格达市交通拥堵的严重程度加剧,影响了公众对社区的看法。城市街道系统的用户会经历较长的出行时间,因此有必要通过协调的交通信号系统进行优化交通运营。此外,还需要缓解拥堵,促进城市走廊沿线的交通流动。本研究旨在评估和优化巴勒斯坦干线走廊上选定十字路口的交通信号配时,并应用协调信号系统来减少用户在选定城市走廊上的出行时间。使用Synchro(第9版)(Al Nakhala交叉口、Al Sakhra交叉口和贝鲁特交叉口)对拥堵信号交叉口进行了分析和评估。此外,还提供了他们为改善交通性能和减少延误而采取的策略。当前交通状态下服务水平的总体评估为(服务水平F),平均控制延误为(197.2、166.8和262.3)秒/辆。分别用于Al Nakhala、Al Sakhra和贝鲁特十字路口。排队长度在两个周期后出现,在交通过饱和的情况下,交叉口的拥堵更加严重。通过将Al Nakhala、Al Sakhra和Beirut交叉口的控制延迟分别从(197.2至88)sec/veh、(166.8至46)sec/veh和(262.3至76)sec/vih降低,性能运行效率得到了提高。即使在高交通量和过饱和的条件下,堵塞的十字路口也得到了有效缓解。最后,观察到,所提出的基于标准驱动控制的信号协调在城市走廊上表现显著,减少了车辆延误。然而,流量与通行能力的比率(v/c比率仍然大于1)仍然存在问题,贝鲁特的服务水平仍然较差(服务水平E),Al Nakhala十字路口的服务水平(服务水平F)。信号协调的应用通过减少出行时间、车辆延误和缓解交叉口堵塞来改善交通进展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.50
自引率
0.00%
发文量
56
审稿时长
8 weeks
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