一、课题产生的背景随着社会经济的发展,榆次城市化建设的步伐越来越快,样式新颖、功能齐全的汽车给人们的出行带来了极大的便利,成为大家日常生活的主要交通工具。可是汽车在给人们带来方便的同时,城市交通拥挤问题也凸显出来,严重影响了人们的正常生活和工作,同时也留下了安全隐患。上下 First, the background of the subject with the social and economic development, Yuci urbanization pace of construction faster and faster, new style, full-featured car to people’s travel has brought great convenience to become the main daily life Transportation. However, the car brings convenience to people at the same time, the problem of urban traffic congestion also highlights the serious impact on people’s normal life and work, but also left a security risk. up and down