Development of Computer Applications for Bridge Management System Summary This paper presents the development of sustainable bridge maintenance and management system (BMMS) for concrete highway bridges of Thailand DOH. The methodology framework for designing the computer-based BMMS is presented. Six major processes of the proposed BMMS are briefly described including planning, inspecting, adjusting, predicting, alternative establishing, and implementing. Computer applications are developed to support the proposed BMMS program. Components of BMMS program are organized into a series of modules reflecting different bridge maintenance and management activities. The proposed computer-based BMMS provides comprehensive capabilities for condition rating, deterioration predicting, alternative generating, and scenarios prioritizing, as well as accomplishment tracking. Although the presented BMMS is developed for Thailand DOH, the methodology can easily be extended to other bridge agencies. Keywords: Bridge Maintenance and Management System (BMMS), BMMS Program, Bridge Condition Rating, Bridge Deterioration Models, Bridge Life Cycle-Cost Analysis, Bridge Optimization and Prioritization 1. Introduction Thailand Department of Highway (DOH) has a responsible for a huge number of concrete bridges in highway network. Preservations of these bridges at satisfied service level is necessary to use an efficiently management software to deal with an enormous database of bridges. Interviews bridge experts of Thailand DOH officials revealed that a software program to assist in managing highway bridges as an entire system is not available. This shortcoming is a main difficulty not only in preserving and monitoring the existing bridges but also in strategic planning and optimizing the limited resources of bridge MR&R tasks. This study developed a computer application as a tool to support the requirements of DOH in managing their bridges. The developed BMMS software provides comprehensive capabilities for predicting, prioritizing, and generating alternative scenarios, as well as tracking for accomplishments. The program can be applied appropriately to analyze Thailand concrete bridges with the defaulted parameters which are specific features for Thailand bridges, such as the bridge element condition rating and deterioration models, categories of MR&R actions, improvement costing models, relative environments, and optimization and prioritization policies of bridge MR&R programs. Although the BMMS software was developed for Thailand DOH, the program can easily be applied to other bridge agencies. 2. Development of Sustainable Bridge Maintenance and Management System To develop BMMS, an overall framework of the proposed methodology is presented. Six major processes are divided including planning, inspecting, adjusting, predicting, alternative establishing, and implementing. As a cycle loop, the first procedure might be started at consideration of the planning process. The results after following the MR&R planning process are monitored and tracked in database system. Bridge condition inspecting is conducted based on the developed rating systems. In adjusting process, additional information updated from existing condition inspections is Nukul Suksuwan Doctoral Candidate, CEIM, SET, AIT, Pathumthani, Thailand snukul@wu.ac.th Nukul Suksuwan, born 1975, received his B.Eng. (Civil) and M.Eng. (Transportation) from Prince of Songkla Univ., Thailand, Lecturer in Civil Eng. Program, Walailak Univ., Thailand Space for a portrait 32 x 48 mm B. H. W. Hadikusumo Assistant Professor, CEIM, SET, AIT, Pathumthani, Thailand kusumo@ait.ac.th B.H.W Hadikusumo, born 1970, received his B.Eng. (Civil) from Universitas Diponegoro, Indonesia, M.Eng. (CM) from AIT, Thailand, and Ph.D. from The University of Hong Kong Space for a portrait 32 x 48 mm