Being located in the southern part of Hengduanshan Range with complex environmental condition, the highway area has complex landform and geological structures, and intensive neotectonic activity.

• 由于地处中国西南地质环境条件极其复杂的横断山区南段，该廊带地形地貌和地质构造都极其复杂，新构造活动强烈，导致地质灾害频发，并以类型全、数量多、规模大为特点。