高速公路在我国酌出现和快速发展,极大地拓宽人们的视野,促进了经济的发展。到2005年5月,我国高速公路总通车里程已突破3万公里,居世界第二位。可以预见,高速公路将对我国国民经济的发展和人民生活水平的提高发挥越来越重要的作用。然而,高速公路在我国起步晚、发展快的现状,使人们享受到高速公路带来的方便和快捷,同时,也饱尝了高 The appearance and rapid development of expressways in our country have greatly broadened people’s horizons and promoted economic development. By May 2005, China’s total freeway mileage has exceeded 30,000 km, ranking second in the world. It can be predicted that the expressway will play an increasingly important role in the development of our national economy and the improvement of people’s living standard. However, the expressway started late in our country and developed fast so that people can enjoy the convenience and speed brought by the expressway. At the same time, they also have enjoyed high