公路经济的研究与实践证明,公路特别是高速公路对区域经济和社会发展有着重要的推动作用。因此,修建公路已成为加快区域特别是欠发达地区经济社会发展的重要途径。但修建公路需要巨额资金,如 The research and practice of highway economy prove that highways, especially freeways, play an important role in promoting regional economy and social development. Therefore, the construction of highways has become an important way to speed up the economic and social development in the region, especially in the less developed regions. However, the construction of roads requires huge amounts of money, such as