有路面公路是指铺有各种路面的公路，包括高级路面、次高级路面、中级路面和低级路面。
新中国成立初期，我国公路通车里程仅为8.07万公里，有路面里程3万公里。
In 1949, China had a highway mileage of only 80700 km, with 30000 km paved.
既有路面结构性能的评价与处治利用是公路拓宽工程的关键技术之一。
The evaluation of existed-pavement structure performance and its application are one of key technologies for road widening.
公路改扩建设计首先要对现有路面性能的衰减状况进行调查，以获取路面的基础设计参数。
Highway upgrading design firstly must survey the performance-weakening condition of present pavement to obtain pavement basis designing parameters.
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