山岭区二级公路选线优化

On the Design of the Cross Section of Highway at Entrance and Exit of Towns and Cities

结合实例提出山岭区二级公路选线的关键是：综合考虑、经济合理。

Based on the characteristics of entrance and exit of towns and cities, the paper suggests a rational design of the cross section of highway according to local conditions. Putting various factors together, the author concludes that the kind of highway divided into four lanes is suitable.