According to the characteristics of the project in this section, the overall design scheme must implement "advanced technology, safety and reliability, applicability and durability,The basic principle of "economic rationality"; Implement the concept of "fast, smooth, safe, environmentally friendly and beautiful", and adhere to the principle of "people-oriented"Based on the design guiding ideology of "based", "safety, harmony and environmental protection" and "life cycle cost", the highway should be controlled reasonablyConstruction cost. In this survey and design process, the following design principles should be emphasized.