摘要
为全面分析不合理绿化导致的行车安全问题,研究了平曲线内侧绿化对行车视距的影响,中央分隔带绿化植物株距和高度对防眩、横向通视、植物存活率等的影响,大冠径常绿类植物对道路净空、驾驶员心理的影响,绿化遮挡交通标志或高速公路出入口对行车产生的误导现象,立交匝道及其出入口绿化对行车诱导、出口缓冲和入口通视的影响,以及隧道出入口绿化对眼睛明暗适应性的影响。提出平曲线内侧的植物冠径和冠高控制措施,并根据防眩要求从儿何上确定计算中央分隔带植物的株距、高度的方法,最后探讨了对隧道出入口和立交匝道不同位置绿化安全性的强化措施。研究表明,绿化可从多方面对高速公路行车安全产生影响。
In order to analyze the traffic safety problems caused by unreasonable road-construction planting, the paper studies the sight distance affected by the medial horizontal curve-circular sections planting, such as the distance between the trees and flowers and their heights in the median, which may cause glare prevention, horizontal visibility and botanical survival in the poor growing conditions. At the same time, thick bush clusters may affect the expressway clearance and the drivers＇ psyche. We have also studied the other accidentcausing factors, such as growing of traffic-block signs or expressway import and export manners. In addition, we have also analyzed the likely-to-be negative effects of trees-planting around the interchange ramps, suck as driving guide along the ramp, energy buffer when ve- hicles are running out of control at the ramp entrance, the horizontal visibility at the ramp exit. And, finally, the paper has also pointed out that the inappropriate planting nearby both the sides of a tunnel tends also to be weakening drivers＇ vision for the need of the light- and-dark sharp-change adaptation. Based on all the above investiga- tions, the paper puts forward necessary measures on how to control planting crown highness and radius in the medial horizontal curve sec- tions. In order to meet the demand of glare prevention, we have also worked out accounting methods of the distance between the plants in median and their hights from the geometric aspects. And, at last, conclusions are drawn on how to design planting in favor of traffic se- curity, especially along the interchange ramps and on the two sides of a tunnel. Thus, it can be inferred that planting can impact driving safety in a number of ways. However, measures put forward here in this paper can only be expected to restrict to some extent the negative impacts brought by the road-side planting.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2010年第1期163-168,共6页
Journal of Safety and Environment
基金
津汕高速公路冀津界至冀鲁界段绿化工程优化研究项目
关键词
道路工程
高速公路
绿化
安全影响
road engineering
expressway
forestation
safety impact
作者简介
作者简介：肖代全，讲师，从事交通安全、交通环境研究，xiaodai-quan@yeah．net。
