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An evaluation of 85~(th) operating speed and posted speed limit based on horizontal, vertical alignments and traffic conditions: Case study of two lane urban roadway

机译:基于水平,垂直对准和交通条件的85〜(Th)运行速度和透明速度限制的评估:对两个巷道城市道路的案例研究

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Operating speed profile analysis is the most used methods in evaluating the consistency of the roadway design where it estimates the operating speed of the vehicle. In the case of roadways for Universiti Teknologi MARA (UiTM) Shah Alam, the horizontal curve was classified as a sub-standard curve and a speed limit of 25 kilometres per hour (km/h) has been enforced along the curve to ensure traffic safety both to vehicle drivers and pedestrians. The 25 km/h posted speed limit was used based on the location of the case study area is within the university. The purpose of this study firstly to evaluate the relationship of 85th percentile operating speed in conjunction with horizontal and vertical alignments at three (3) points which are at the beginning, mid and end of curve. Secondly, to study relationship between turning radius of selected vehicles and the lane width along the curve.
机译:操作速度剖面分析是评估道路设计的一致性的最多方法,其中估计车辆的运行速度。在大学的道路(UITM)Shah Alam道路的情况下,水平曲线被归类为亚标准曲线,沿着曲线强制强制执行每小时25公里(KM / H)的速度限制,以确保交通安全两者都可以到车辆司机和行人。基于案例研究区域在大学内的位置使用25公里/小时的速度限制。本研究的目的首先,将85百分位的运行速度与水平和垂直对准结合在曲线的开始,中间和结束时结合使用水平和垂直对齐的关系。其次,为了研究所选车辆的转向半径与沿曲线的车道宽度之间的关系。

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