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首页> 外文会议>Transportation Research Board Annual meeting >Investigation of the Early-onset Breakdown Phenomenon at Urban Expressway Bottlenecks in Shanghai
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Investigation of the Early-onset Breakdown Phenomenon at Urban Expressway Bottlenecks in Shanghai

机译：上海城市高速公路瓶颈早发故障现象调查

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Based on the analyses of recurring bottlenecks in Shanghai's expressways s usingspatial-temporal diagrams, two typical isolated bottlenecks (a lane drop and an on-ramp) wereselected and the method of transformed curves was used to investigate the traffic flowcharacteristics revealed by loop detector data. The pre-queue flow (PQF) and queue dischargeflow (QDF) of the two bottlenecks were analyzed. It was discovered that QDF was higher thanPQF in the lane-drop and on-ramp bottlenecks, the average difference were 18% and 27%respectively. These findings differ from the results of diverse bottlenecks in other countries (e.g.M4 motorway near London, United Kingdom, I-494 in Minneapolis, Minnesota, USA, the QueenElizabeth Way (QEW) and the Gardiner Expressway in metropolitan Toronto, Canada), andindicate the lane-drop and on-ramp bottlenecks in Shanghai experience an early-onset of trafficbreakdown. Finally, the potential causes of this early-onset of breakdown were discussed from theaspects of driving behavior, the temporal features of flow rate and the features of merging.
机译：基于上海高速公路使用中反复出现的瓶颈分析。 时空图，两个典型的孤立瓶颈（车道下降和匝道）是 选择并使用变换曲线的方法来研究交通流量 环路检测器数据揭示的特性。队列前流（PQF）和队列释放 分析了两个瓶颈的流量（QDF）。发现QDF高于 车道下降和匝道瓶颈中的PQF，平均差异分别为18％和27％ 分别。这些发现与其他国家/地区存在的各种瓶颈的结果不同（例如， M4高速公路在英国伦敦附近，I-494在美国明尼苏达州明尼阿波利斯的女王 Elizabeth Way（QEW）和加拿大多伦多都会区的Gardiner高速公路），以及 表明上海的车道下降和匝道瓶颈出现了较早的交通 分解。最后，从 驾驶行为，流量的时间特征和合并特征。

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