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Assessing the Impact of Speed-Limit Reduction near Signalized High-Speed Intersections Equipped with Advance-Warning Flashers
| 题名： | Assessing the Impact of Speed-Limit Reduction near Signalized High-Speed Intersections Equipped with Advance-Warning Flashers |
| 其他题名： | Aarts,L.,and Schagen,I.V.(2006)."Driving speed and the risk of road crashes:A review."Accid.Anal.Prev.,38(2),215–224. |
| 正文语种： | 英文 |
| 作者： | Shefang Wang |
| 关键词： | section；speed；reduct；flash；signal；advance；counter；observe；compliance；limit |
| 摘要： | An advance-warning flasher alerts drivers of the imminent onset of a yellow light at a signalized intersection, and it is widely used to reduce crash frequency and severity. Recently, a more-aggressive countermeasure, a speed-limit reduction, is being used at high-speed signalized intersections in addition to advance-warning flashers. In this paper, six high-speed intersection approaches in Nebraska were evaluated to assess the operational effects of no speed-limit reduction, an 8.0 km=h (5 mi=h) speed-limit reduction, and a 16.1 km=h (10 mi=h) speed-limit reduction in the vicinity of high-speed signalized intersections equipped with advance-warning flashers. The placement of speed-limit-reduction signs resulted in significant reductions in observed speeds only when upstream drivers were traveling at speeds higher than a comfortable range-1.8 to 4.0 km=h (1.1 to 2.5 mi=h) higher than the regulatory speed limit. The likelihood of this condition being satisfied was higher in case of 16.1 km=h (10 mi=h) drop; however, it was not found to be true when the speed limit was dropped by 8.0 km=h (5 mi=h). Also, the compliance rates to the regulatory speed limit varied from 15 to 85％, highlighting the fact that ambient conditions have a much greater influence on drivers' speed choices as compared to the regulatory speed limit. This research provides further evidence that speed-limit reductions, in conjunction with advance-warning flashers, appears to be an effective safety countermeasure; however, their effects will be dependent on the amount of speed-limit reduction and observed speeds. |
| 出版年： | 2017 |
| 论文唯一标识： | P-72Y2017V143N06004 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/JTEPBS.0000035 |
| 期刊名称： | Journal of Transportation Engineering |
| 拼音刊名(出版物代码)： | P-72 |
| 卷： | 143 |
| 期： | 06 |
| 页码： | 25-34 |
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