route aligment,operating speed and roadbed slope.

To overcome the shortcoming,this paper presents a new fault location method for teed lines,assuming the fault occurs at each of the three branches re.

Based on distributed parameter model and analysis of differential sequence circuit in Teed line, an accurate fault location algorithm for Teed line is described.

All of the fault location methods currently used for teed lines need to identify the fault section first, then convert the three-terminal line to a two-terminal line to locate the fault.

Cartoon simulation analysis of illusion caused by highway alignment and roadside environments;

On the suitability problem of highway alignment;

Application of possible velocity in design for highway alignment;

Steering task complexity analysis on highway alignment and design control

Exploration on the landscape design of road alignment design;

Safety evaluation of road alignment based on energy conservation law

At the base of harmony between road alignment and landscape,we analysed the harmony between the road alignment and environment,then expound some relations in horizontal and vertical alignment.

Based on the characteristics of expressway traffic,this paper has analysed the influence of road line shapes and their combination,road surface and traffic environment on the expressway traffic safety from the design,construction and application of expressways.