Research And Implementation Of Intelligent Decision Support System For Major And Middle Rehabilitation Of Trunk Highways

"Intelligent Decision Support System for Major and Middle Rehabilitation of Trunk Highways" is a computer software system based on computer technology, and theory and methodology of highway maintenance and analysis. The system can be applied to the analysis of major and middle rehabilitation of trunk highways, and to the preparation of annual scheduling for major and middle rehabilitation. HDM4 (Highway Development and Management Tool No.4) road analysis model, which was developed by the Word Bank and applied globally, has been introduced into the system. Based on experience of local experts and national technical specifications on maintenance, analysis and estimates were conducted for road performance, maintenance operations and fund demands. These were applied to assist in preparation of operation scheduling for major and middle rehabilitation in Henan Province, to optimize the major and middle rehabilitation schemes and to enhance funding efficiency. The project provides solutions for some critical problems in analysis of roads: the establishment of model library for analysis of road maintenance and the establishment of expert library based on maintenance specifications and experience of experts. Meanwhile, the project carried out a thorough study on localization of the internationally known HDM4 analysis model, and local application of the HDM4 analysis model has been realized.Multiple techniques were integrated in the study of the project to achieve intelligent decision and management over the highway maintenance In order to make the HDM4 analysis model fit for the application in Henan Province, a number of experiments were carried out to calibrate the analysis model, and many studies were conducted on data pre-processing, data transformation interface management, resultant data post-processing, decision tree establishment and analysis and management of history data for the analysis model. A corresponding computer software system was designed and applied in the 11th Five-Year plan of trunk highway maintenance for Henan as well.