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首页> 外文期刊>International journal of transportation >Impact of Incidents on Traffic Congestion in Dar es Salaam City
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Impact of Incidents on Traffic Congestion in Dar es Salaam City

机译：事件对达累斯萨拉姆市交通拥堵的影响

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摘要

Poorly managed traffic incidents have largely contributed to congestion and delay in the city of Dar es Salaam. A thorough understanding of travel delays caused by incidents is therefore essential for effective countermeasures against the increasing congestion. The method used to determine delays in this research is based on the deterministic queuing theory. Information on incidents was obtained from traffic surveys, traffic police and road users. Counting of the number of vehicles passing the incident location was done on incident and incident-free days. The cumulative traffic counts on incident and incident-free days were then calculated and used to plot the queuing diagram used to determine incident induced delay. This method turned out to be a useful tool for estimating incident induced delay in areas with less sophisticated equipment i.e. where there are no sensors, CCTV cameras, etc. The method provided good estimates of incident induced delay which may help planners and transportation officials in better understanding incident related congestion and in selecting more effective countermeasures against incident related traffic congestion in the city. It was found out that the effects of incidents were different for the different zones, types of incidents and the periods the incident occurred. In addition to the incident duration and the number of vehicles affected, the impact of incidents also depended on availability of alternative routes, number of lanes on the road, discipline of the driver in manoeuvring at incident location and traffic control at the scene.
机译：管理不善的交通事故在很大程度上导致了达累斯萨拉姆市的交通拥堵和延误。因此，对事件引起的旅行延误的透彻了解对于有效应对日益加剧的交通拥堵至关重要。本研究中用于确定延迟的方法基于确定性排队理论。有关事件的信息是从交通调查，交警和道路使用者那里获得的。在事故发生日和无事故发生日对通过事故地点的车辆数量进行计数。然后计算了事故发生日和无事故发生日的累计流量计数，并将其用于绘制排队图，该排队图用于确定事故引起的延迟。事实证明，此方法是一种有用的工具，可用于在设备不那么复杂的区域（即没有传感器，闭路电视摄像机等）中估计事件引起的延迟。该方法可以很好地估计事件引起的延迟，这可能有助于规划人员和运输官员更好了解与事件有关的交通拥堵，并选择更有效的对策以应对城市中与事件有关的交通拥堵。结果发现，事件的影响对于不同的区域，事件类型和事件发生的时间是不同的。除了事故持续时间和受影响的车辆数量之外，事故的影响还取决于备用路线的可用性，道路上的车道数量，驾驶员在事故发生地点进行操纵的纪律以及现场的交通管制。

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  • 来源
    《International journal of transportation》 |2013年第2期|95-107|共13页
  • 作者

    David A. Mfinanga; Emmanuel Fungo;

  • 作者单位

    Department of Transportation and Geoteehnical Engineering, University of Dar es Salaam P.O. Box 35131 Dar es Salaam, Tanzania;

    Department of Transportation and Geoteehnical Engineering, University of Dar es Salaam P.O. Box 35131 Dar es Salaam, Tanzania;

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