Superposition Images on Highway Engineering Geologic Disasters and National Expressway Net Based on MAPGIS;

Based on the investigation data of national geologic disaster survey for counties and cities from 1999 to 2005,the inquiry system of superposition images on engineering geologic disasters and national expressway net(7918net),as an example,is established with the scale of 1∶18000000 by MAPGIS 6.

Topology of expressway net has changed when traffic accident occurred.

It was introduced that a joint logistics model for expressway service area should be built on the basis of expressway net.

Several key questions of freeway network planning;

Integrated optimal control model of freeway network based on particle swarm optimization

This paper proposed a quantitative methodology for analyzing the interchanges demand of freeway network.

Generalized planning system of provincial expressway network based on traflic engineering;

Study of Unbalanced Regional Development Patterns and Spatial Distribution of Expressway Network;

This paper analysed the expressway network planning characteristic and planning evaluating aim.

Study on the Ecological Environment of Highway Network Planning & Environmental Assessment;

Interchange as the joint , is a fundamental composition of highway network, whose distribution is very important to transportation efficiencyThis paper studies the pertinency factor to distribution planning of interchange in highway network .

But the highway network construction to the ecological environment influence is noticeable, especially to the nature protection area, the forest park, the scenery scenic spot area, the tap water source area, the basic farmland, the geological protection and so on.