高速公路线形指标的合理选择不但有利于行车安全，也有利于路基工程稳定和环境景观，坚持“以人为 本”、“安全至上”、“环保优先”的原则，更新设计理念，搞好山区高速公路的线形设计，使公路路基与地形地貌相 吻合，避免高填深挖工程，为行车安全和环境保护做出贡献

The rational selection of linear index for high-speed highway not only assists the safety of running, but also assists the stability of subgrade and good looks of environment. In order to tally highway subgrade with landform, avoid deep filling and excavation engineering, and guarantee safety of running and environment protection, the principle of "Taking man as basis, safety as top and environment protection as priority" should be adhered to linear design of mountain high-speed highway.