Highway horizontal alignment design is a systematic project. However, in the specific design, The current methods of plane design are mainly trial algorithm and inverse algorithm, which is inefficiency and easy missing excellent solutions. This paper introduces an intelligent method that describes the process of intelligent horizontal alignment design. In order to construct a horizontal alignment design based on route orientation constraint, the intelligent evolutionary algorithm-genetic algorithm and plane design method are assimilated to horizontal alignment design process. Mainly, this method absorbs the idea of classification -integration and iterative method. And the constraints and the basic curve combination can be classified. Then, the genetic evolution strategy and genetic operators can be established. Furthermore, the designers can evaluate and select the population of horizontal alignment elements with the help of specialized knowledge. And eventually, the intelligent design model can be built, which automatically determines the alignment combination and automatically recommends the alignment elements. In theory, the discrepancy in the progressive requirements for horizontal alignment design even greater than traditional CAD horizontal design. Thus, the horizontal alignment design has unique feature in Adaptive Capabilities and Global Search Capabilities.

CICTP