高速公路以什么为标准呢?第一,全程封闭;第二,出入口是互通式立交,不用红绿灯;第三,现代化的交通设施和科学管理,这样,能在较短时间里通过更多数量的汽车。所以高速公路要经过特别设计,它上面的车道需宽且多,以保证汽车流量得以空前提高。世界上第一条高速公路于1932年在德国开始建设,第二年建成,路段是从柏林到汉堡。1933—1942年间,德国共修建了3860千米高速公路,以适应希特勒的摩托化部队进行“闪电战”的需要。在“二战”期间,德国之所以能够接连以闪电的速度吞并一个又一个 Second, the interchange is an interchange, without traffic lights; Third, the modernization of transport facilities and scientific management, so that in a relatively short period of time through a greater number of car. Therefore, the expressway has to be specially designed with wide and multi-lane lanes to ensure an unprecedented increase in vehicle traffic. The world’s first motorway started construction in Germany in 1932 and was completed in the second year, from Berlin to Hamburg. Between 1933 and 1942, a total of 3,860 km of highways were built in Germany to accommodate the need for the blitzkrieg of the motorized units of Hitler. During World War II, Germany was able to annex one after another lightning speed