Because the application of CAD technology in railway or highway alignment design what concerns multi-objective decision-making of many schemes has its shortcoming,it s necessary to introduce artificial intelligence into this field.

Therefore,freeway alignment design in mountain area has to be from the point of view of environment protection as one of the control factors for route plane and profile design,to reduce the damages to environment lowest during the earlier period of the design,and to satisfy the demand of social maintaining.

On mountainous highway road route design;

Some realizations of route design of mountainous highway;

Application of safety assessment to highway route design

Sequential control of electric motor and circuit design;

In order to get out from the cockamamie work in road route design for designers,authors analyzed the possible number of recombination schemes using combinatorics,and studied the logic relations among local schemes and the constraint condition on scheme recombination.

Based on the foundation of other current research works, we set up several specific researches for the route design parameters of the urban rail transit stations and the platform gap design criteria, which are as follows:1.

In order to get out from the cockamamie work in road route design for designers,on the basis of studying the internal relations among local schemes,local scheme was decomposed to small unit logic schemes;the directed network was used to represent the topological connection;the united data structure of point-arc was used to express a network graph.