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一、引言 我国高速公路的出现,始于80年代初,短短二十年来,高速公路发展迅速。仅1997年建成通车的高速公路就达1 313km,比1996年建成通车的高速公路1 117km高出186km。这种连续两年新增高速公路超过1 000多km的增长速度,在国际高速公路建设史上是罕见的。特别是90年代以来,我国高速公路的年均增长速度一直位居世界前列,目前,我国高速公路总里程已达19 000km,位居世界第二位。这些年来,按
I. INTRODUCTION The appearance of our expressway started in the early 1980s. In the short span of two decades, the expressway has developed rapidly. The number of highways opened to traffic in 1997 reached 1 313km, 186 km higher than the 1 117km expressway opened to traffic in 1996. The growth rate of more than 1,000 kilometers of newly added expressways in two consecutive years is rare in the history of international freeway construction. Especially since the 1990s, the average annual growth rate of our country’s expressways has been the highest in the world. At present, the total mileage of our expressways has reached 19,000km, ranking the second in the world. Over the years, press