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1引言2004年冬季的北京频繁经受着大雾天气的考验,在我们不断积累着雾天交通应急预案经验的同时,我们是否想到导致这频繁大雾天气的原因呢?是什么让我们在充分享受经济飞速发展的同时,我们生活的自然环境却变得越来越灰暗?由于汽车保有量迅速上升,道路基础设施建设无法满足社会
1 Introduction Beijing in the winter of 2004 is subject to frequent fog tests. As we continue to accumulate experience in the foggy-day traffic emergency plan, do we think of the causes of this frequent heavy fog? What makes us fully enjoy With the rapid economic development, the natural environment in which we live is becoming more and more gloomy. Due to the rapid increase in car ownership, the construction of road infrastructure can not meet the needs of society