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Measurement and analysis of pavement marking retroreflectivity

机译：路面标记回射率的测量与分析

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Retroreflective pavement markings enhance road safety by increasing visibility of roadway delineation for road users. In most countries, authorities responsible for road safety do not have performance intervention criteria and standards, and rely on fixed-time interval maintenance programs. This practice is undergoing change via the introduction of mobile retroreflectivity recording units. The focus of this study is to investigate the use of standard mobile retroreflectivity recording units and to analyse the observed retroreflectivity data to evaluate the state of pavement markings under investigation. The centreline pavement marking retroreflectivity data collected by Queensland Department of Main Roads using the ECODYN mobile retroreflectivity recording unit are analysed to determine how the factors such as pavement surface type and traffic environment relate to retroreflectivity performance. It has been found that the mobile retroreflectivity recording unit with in-built processing capabilities can be implemented for identifying the requirements of maintenance programs, as well as to relate the observed retroreflectivity with other factors such as pavement surface type and traffic environment. The observed data indicated that there is a disparity between urban and rural roads of southeast Queensland in terms of centreline pavement marking retroreflectivity qualities. Asphalt surfaces, common in urban environments, were found to have average retroreflectivity over 200 mcd/m~2/lux, whereas sprayed seal surfaces, common in rural environments, averaged below 170 mcd/m~2flux. About one-third of the roads used in the analysis fell below the generally accepted minimum threshold of 150 mcd/m~2flux at the time of observation.
机译：逆反射路面标记通过增加道路使用者对道路轮廓的可见性来增强道路安全。在大多数国家/地区中，负责道路安全的主管部门没有绩效干预标准和标准，而是依靠固定时间间隔的维护计划。通过引入移动后向反射记录单元，这种做法正在发生变化。这项研究的重点是调查标准移动式反光记录装置的使用，并分析观察到的反光数据，以评估所研究的路面标记的状态。昆士兰州干道部使用ECODYN移动式反光记录仪收集的中心线路面标志反光数据进行了分析，以确定诸如路面类型和交通环境等因素如何与反光性能相关。已经发现，具有内置处理能力的移动式回射记录单元可以被实施用于识别维护程序的需求，以及将所观察到的回射率与诸如路面类型和交通环境之类的其他因素相关联。观察到的数据表明，昆士兰州东南部的城市和乡村道路之间的中心线路面标志着后向反射性质量存在差异。发现在城市环境中常见的沥青表面平均回射率超过200 mcd / m〜2 / lux，而在农村环境中常见的喷涂密封面的平均回射率低于170 mcd / m〜2flux。在分析时，约有三分之一的道路低于公认的最低阈值150 mcd / m〜2flux。

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