IMPACTS OF BUS ONLY LANES ON SIGNALIZED INTERSECTION UNDER HETEROGENEOUS TRAFFIC CONDITIONS

IF 0.2 Q4 MULTIDISCIPLINARY SCIENCES Suranaree Journal of Science and Technology Pub Date : 2023-06-30 DOI:10.55766/sujst-2023-01-e01617
Muhammad Azam, Muhammad Nadeem, Sitti Asmah Hassan, Othman Che Puan
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Abstract

The unsolicited delays and unpredictable travel times are common in urban areas of Pakistan hence making it difficult to maintain the image of public transport. Bus priorities provided in terms of dedicated bus lanes at intersections are considered as a solution to improve the conditions for public transport. Conversely, dedicated lanes may negatively affect the performance of other vehicular classes. This study quantifies the impact of Bus Only Lanes (BOLs) on the intersection’s performance as well as on the performance of individual vehicular class. The VISSIM microsimulation tool was employed to a signalized intersection located in urban area under heterogeneous traffic conditions. Sensitivity analysis followed by trial and error method was conducted to calibrate the microsimulation model. The calibrated VISSIM model was utilized to run three scenarios; scenario-1: existing conditions, scenario-2: converting existing lanes to BOLs and scenario-3: providing additional lanes as BOLs. The results indicated that for scenario-2, buses experience 14-16% lesser travel time and 10.5% reduction in delays as compared to scenario-1 due to dedicated right-of-way, while all other vehicular classes experience deteriorated conditions. Scenario-2 affected the intersection’s performance and caused an increase of 5.6% in average delay, 9.0% in average maximum queue length and reduction in average speed by 9.8%. However, in scenario-3, BOLs as additional lanes improved the conditions for buses and also reduced the travel time and delays for other vehicular classes. It is established that the present findings may assist the planners and decision makers to revisit the policies for public transport services.
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异构交通条件下公交专用道对信号交叉口的影响
在巴基斯坦的城市地区,不请自来的延误和不可预测的旅行时间很常见,因此很难保持公共交通的形象。在十字路口设立专用巴士专用道,是改善公共交通条件的一种解决方案。相反,专用车道可能会对其他车辆类别的性能产生负面影响。本研究量化巴士专用道(bol)对交叉口性能的影响,以及对个别车辆类别性能的影响。采用VISSIM微仿真工具对异构交通条件下的城市信号交叉口进行了仿真。采用灵敏度分析和试错法对微模拟模型进行了标定。利用标定后的VISSIM模型运行三种场景;场景1:现有条件,场景2:将现有车道转换为bol,场景3:提供额外车道作为bol。结果表明,与场景1相比,在场景2中,由于专用路权,公共汽车的行驶时间减少了14-16%,延误减少了10.5%,而所有其他车辆类别的情况都恶化了。场景2影响交叉口性能,导致平均延误增加5.6%,平均最大排队长度增加9.0%,平均速度降低9.8%。然而,在方案3中,bol作为额外的车道改善了公共汽车的条件,也减少了其他车辆的行驶时间和延误。本研究结果可协助规划者和决策者重新审视公共交通服务的政策。
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
Suranaree Journal of Science and Technology
Suranaree Journal of Science and Technology MULTIDISCIPLINARY SCIENCES-
CiteScore
0.30
自引率
50.00%
发文量
0
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