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首页> 外文期刊>Promet-traffic & transportation >ANOMALOUS QUALITY OF SERVICE DETERIORATION AT ROUNDABOUTS CAUSED BY RAINFALL
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ANOMALOUS QUALITY OF SERVICE DETERIORATION AT ROUNDABOUTS CAUSED BY RAINFALL

机译：降雨造成的回旋中服务质量的反常质量

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摘要

The paper investigated the extent to which rainfall influences the quality of service delivery at multilane roundabouts using a novel quality of service approach. Quality of service is defined as how well roundabouts operate based on road users and road providers' perception of service quality. Delay and reserve capacity were used respectively as proxies for road users and road providers' perception of service quality. The entry and circulating traffic data were recorded continuously for eight weeks under dry, light, moderate, and heavy rainfall weather conditions at each surveyed roundabout, then collated, analysed and compared. Linear regression with dummy variable was used to model the roundabout entry capacity and a corrector factor was added to modify the regression function. The corrector factor considered different entry radii and entry angles of surveyed roundabouts. Multi-criteria quality of service table with travel time as proxy for road users and speed as proxy for road providers'perception of service delivery was developed from peak traffic data and used to determine the extent of deterioration. The multi-criteria table introduced in the paper is a clear departure from the speed-based criteria used in many studies. The results show a significant increase in time delay and a decrease in reserve capacity relative to rainfall. The paper has concluded that rainfall has an anomalous negative effect on the quality of service at multilane roundabouts. The findings could be used in a variety of ways in traffic management to predict the travel time at roundabouts under rainy conditions and to prescribe speed limits accordingly.
机译：本文使用一种新颖的服务质量方法，研究了降雨对多车道回旋处服务质量的影响程度。服务质量定义为基于道路使用者和道路提供者对服务质量的感知，回旋处的运行状况。延迟和保留容量分别用作道路使用者和道路提供商对服务质量的感知的代理。在每个被调查的回旋处，在干燥，轻度，中度和强降雨天气条件下，连续八周记录入口和循环交通数据，然后进行整理，分析和比较。使用具有虚拟变量的线性回归模型来模拟回旋处的通行能力，并添加校正因子来修改回归函数。校正因子考虑了不同的回旋半径和被测回旋处的入射角。根据交通高峰流量数据，开发了以旅行时间作为道路用户代理，速度作为道路提供商对服务交付感知的代理的多准则服务质量表，用于确定恶化程度。本文介绍的多标准表明显不同于许多研究中使用的基于速度的标准。结果表明，相对于降雨而言，时间延迟显着增加，后备能力下降。本文得出结论，降雨对多车道回旋处的服务质量具有反常的负面影响。这些发现可以在交通管理中以多种方式用于预测下雨天在回旋处的行驶时间，并据此规定速度限制。

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