高速公路是国家交通现代化的标志。它是需要高额投入、长期使用的公共产品。其一经规划和修建,将极大地影响国家的城市化布局、国土的整治和利用、区域规划和建设以及经济带的形成。其直接、间接与潜在的效益几乎囊括经济、社会、文化、国防各个领域。作为综合运转体系中的“主动 The highway is a sign of the modernization of the country’s traffic. It is a public product that requires high investment and long-term use. Once planned and constructed, it will greatly affect the nation’s urbanization and layout, land reclamation and utilization, regional planning and construction, and economic belt formation. Its direct, indirect and potential benefits include almost all fields of economy, society, culture and defense. As a comprehensive operation system in the "initiative