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Safety Impacts of Selected Median and Access Design Features; Final rept
| 题名： | Safety Impacts of Selected Median and Access Design Features; Final rept |
| 作者： | Long, G.; Gan, C. T.; Morrison, B. S. |
| 关键词： | Accident rates; Accident location; Highway design; Medians; Access control; Accident statistics; Highway characteristics; Highway accident potential; Highway safety |
| 摘要： | The research investigates the safety of selected median and access design features using reported crash records from multiple years for the State Highway System. One of the early findings was that it is difficult to identify individual locations that are suitable for such studies. Only a few candidate locations were submitted for study, and most of them were not suitable either because of insufficient time had passed after the modification and been made to allow a before-and-after study, too many features had been changed simultaneously to attribute the effects to specific features, other uncontrollable conditions affecting crash rates also changed, pairs of locations similar in all conditions except the feature of interest could be found, or there was no information available on similar facilities to compare against. Due to different crash reporting statutes in different states, it was recognized that it may not be valid to compare against crash rates reported in other studies or against composite statistics compiled from multiple states. |
| 总页数： | 132p |
| 报告类型： | 科技报告 |
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