目前世界上已有50多个国家和地区建成约15万公里高速公路。我国已有沪嘉(上海市～嘉定县)、莘松(上海市莘庄～松江)、西安～临潼、广州～佛山、广州坏市、广州～深圳～珠海、北京～天津～塘沽等高速公路相继开工兴建,我国的公路建设进入了一个新阶段。笔者最近了解到,我国已开工和计划修建的高速公路总长约850多公里;按高速公路线形设计的一级公路、半幅高速公路等有1400多公里。公路建设出现了从未有过的喜人形势。 At present, more than 50 countries and regions have built about 150,000 kilometers of expressways in the world. China already has Shanghai Jia (Shanghai ~ Jiading County), Xinsong (Shanghai Xinzhuang ~ Songjiang), Xi’an ~ Lintong, Guangzhou ~ Foshan, Guangzhou bad market, Guangzhou ~ Shenzhen ~ Zhuhai, Beijing ~ Tianjin ~ Start construction, our country’s highway construction has entered a new phase. Recently, I have learned that the total length of expressways under construction in China and planned to be built is more than 850 km. There are more than 1,400 km of first-class highways and half-expressways designed according to the expressways. Highway construction has never seen a gratifying situation.