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高速公路是一个国家经济和社会发展的产物 ,是衡量一个国家公路交通运输和汽车工业现代化水准的重要标志。高速公路在世界公路交通运输和各国国民经济发展中具有举足轻重的地位和作用。高速公路是在普通公路的基础上 ,利用新的科技成果发展起来的。它避免了普通公路的一些弱点
The expressway is a product of the economic and social development of a country and an important indicator of the modernization level of a country’s road transport and auto industry. The expressway plays an important role and role in the world’s road transport and national economic development. The expressway was developed on the basis of ordinary roads and made use of new achievements in science and technology. It avoids some of the common weaknesses of the road