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Evaluation of the in-service safety performance of safety-shape and vertical concrete barriers.

机译：评估安全型和垂直混凝土屏障的在役安全性能。

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摘要

Roadside concrete barriers have been widely used to protect errant motorists from hitting roadside hazards or obstacles. Two concrete barrier profiles, vertical and safety-shape, have been used for this purpose. The safety-shape profile has been shown to produce excessive vehicle climbing which tends to increase rollover propensity. The vertical profile, on the other hand, does not cause vehicle climbing, but it does produce higher lateral forces which may produce higher injury levels.;The objective of this research is to investigate which barrier profile is the safest based on real-world vehicle crash data. The safest barrier profile is defined as the one that produces lower injury levels. Rollover propensity was also used as a second indicator of barrier performance since rollovers may also affect injury severity.;Eleven years of bridge-related crash data was collected from State maintained highways in the State of Iowa. Statistical procedures were used to conduct the data analysis which was sub-divided into two major tasks: rollover analysis and injury analysis.;It was found that rollovers are twice more likely to occur in crashes involving safety-shape barriers as compared to vertical barriers. It was also found that crashes that involved safety-shape barriers resulted in higher injury levels as compared to crashes that involved the vertical barriers.;Therefore, it is believed that the expanded use of vertical barriers would improve overall highway safety. However, this conclusion is based on limited data and a more comprehensive data set covering many more States besides Iowa is recommended for analysis in the future.
机译：路边的混凝土屏障已被广泛用于防止错误的驾驶者撞到路边的危险或障碍物。为此，使用了两个混凝土屏障轮廓（垂直和安全形状）。安全形状轮廓已显示会导致车辆过度爬坡，这往往会增加侧翻倾向。另一方面，垂直轮廓不会导致车辆攀爬，但会产生更大的侧向力，可能会产生更高的伤害水平。本研究的目的是研究基于现实世界的车辆，哪种障碍轮廓最安全崩溃数据。最安全的屏障轮廓定义为产生较低伤害水平的屏障轮廓。倾翻倾向也被用作障碍物性能的第二个指标，因为倾翻也可能影响伤害的严重性。11年与桥梁有关的碰撞数据是从爱荷华州的国营高速公路收集的。使用统计程序来进行数据分析，该数据分析又分为两个主要任务：翻车分析和伤害分析。发现与垂直障碍相比，在涉及安全形状障碍的碰撞中翻车发生的可能性要高两倍。还发现，与涉及垂直障碍物的碰撞相比，涉及安全形状障碍物的碰撞导致更高的伤害水平。因此，人们认为扩大使用垂直障碍物将改善总体公路安全。但是，该结论是基于有限的数据得出的，因此建议将来在爱荷华州以外使用涵盖更多国家的更全面的数据集进行分析。

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  • 作者

    Albuquerque, Francisco Daniel Benicio de.;

  • 作者单位

    The University of Nebraska - Lincoln.;

  • 授予单位 The University of Nebraska - Lincoln.;
  • 学科 Engineering Civil.;Transportation.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 175 p.
  • 总页数 175
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:44:26

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