基于高速公路交通影响的雾天预测研究.doc

文档介绍：
基于高速公路交通影响的雾天预测研究#
张续光1,高静如2,高建平1**
(1. 重庆交通大学土木建筑学院,重庆,400074;
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2. 同济大学交通运输工程学院,上海,201800)
摘要:雾对高速公路交通运行及行车安全有重要影响,掌握雾天出现的天气特征,有利于提
高高速公路雾天管理的有效性和针对性。以重庆高速公路 2009-2011 年两个雾季的交通数据
和天气数据为依据,在分析雾天能见度对高速公路交通影响的基础上,确定影响交通的雾天
能见度阈值为 600m。对雾天形成气象条件的时间演变进行的主成分分析与相关性分析表明,
最大湿度和昼夜温差对雾的形成有决定性影响,其中相对湿度的对起雾的影响大于昼夜温差
影响,将相对湿度大于 95%作为起雾的关键因素。建立了雾天出现的预测模型,为高速公路
雾天管理提供依据。
关键词:交通工程;高速公路;雾天;预测
中图分类号:U491
15
An Analyses on Foggy Weather Prediction for Freeway
Influence
ZHANG Xuguang1, GAO Jingru2, GAO Jianping1
(1. School of Civil Engineering & Archtecture, Chongqing Jiaotong Univwesity, Chongqing
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25
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35
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400074;
2. School of Transportation Engineering, Tongji University, Shanghai 201800, China)
Abstract: Fog weather has a significant impact on freeway traffic safety, and mastering foggy
weather appears feature is a key issue for improving the management effectiveness. According to
2009-2011 fog seasons’ traffic data and weather data of freeways in Chongqing, and based on the
analysis in operating speed, a traffic effect threshold of fog visibility as 600m is identified. A
ponent analysis and correlation analysis on the formation time evolution of
meteorological conditions for fog generating showed that the maximum humidity and temperature
difference between day and night have a decisive impact on the formation of fog. Finally, a odds
ration model