既有道路高速化改造中的视距问题及其特殊处理方法

Sight Distance Problem and Its Special Treatment Mother in Expressing Reconstruction of Existing Roads

在公路路线、立交线形设计中,常常因某些控制因素的制约,对线形的几何设计有特殊要求。该文结合高速公路工程设计实例中遇到的视距设计不足的具体问题,重点阐述线形指标提高受限制时,可采取的保障视距的某些特殊处理方法。

The geometrical design of linearity is specially required by the restriction of some control factors in the design of highway line and interchange linearity.The article introduces the detail problems in the shortage of sight distance design occurred in the expressway engineering design cases,and focuses setting forth on some special treatment methods able to use for ensuring the sight distance when the enhancement of the linear index is limited.