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至 2 0 0 0年底 ,全国已建成高速公路 1 .6万km,其中大部分为 4车道。随着经济的发展 ,某些高速公路将不能满足交通要求 ,需扩大通行能力 ,增加车道数。早期建成的京津塘、沈大等高速公路已经证明了这一点。结合国外经验及根据国家未来经济发展 ,可以断言 ,全国主要经济干线走?
By the end of 2000, 16,000 km of expressways have been built in the country, most of them 4 lanes. With the economic development, some expressways will not be able to meet the traffic requirements and need to expand their traffic capacity and increase the number of lanes. Early built Jingjintang, Shenyang and other highways have proved this point. Combining with the experience of other countries and according to the future economic development of the country, we can assert that the major economic routes in the country are going to be taken away.