长期以来公路作为国民经济重要的公益性基础设施，其修建与维护是由政府来完成的，公路的公益性基本特征在国民经济发展中发挥了重要作用，随着我国经济发展，公路等交通基础设施逐渐成为制约国民经济发展的“瓶颈”，已远远适应不了国民经济发展需要，另一方面，由于公路建设 For a long time, the highway, as an important non-profit infrastructure for the national economy, has been constructed and maintained by the government. The basic features of public roads play an important role in the development of the national economy. With the economic development in our country, the transportation infrastructure such as highways Facilities have gradually become the “bottleneck” restricting the development of the national economy, which has far been unable to meet the needs of the development of the national economy. On the other hand, as the road construction