United States Department of Transportation
i
A Bridge Condition Index for Transportation Asset Management in Ohio
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2018-11-01
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[PDF-5.10 MB]
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Edition:Final Report
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Abstract:A comprehensive and practical performance measure, called Ohio Bridge Condition Index (OBCI), has been developed in this project. OBCI is a cost-based index that ranges from zero to one and represents the performance of bridges at element-, component-, bridge-, and network-levels. The index effectively uses ODOT’s bridge inventory and inspection databases. Effects of serviceability and safety features of bridges are objectively incorporated in this index through a broad set of direct and indirect consequences of various bridge conditions. Based on this novel index and implementing a mixed-integer linear programing technique, a systematic optimal budget allocation algorithm is developed that identifies the optimal Maintenance, Repair, and Replacement (MR&R) work plans for National Highway System (NHS) bridges of ODOT’s districts for available budgets. Application of the proposed index to numerous Ohio bridges show that OBCI not only reflects the impacts of structural deficiencies, but also the adverse consequences imposed on users due to repair actions. It is also demonstrated that OBCI can effectively identify bridges with safety concerns and estimate bridge repair costs for various target performances. Furthermore, through the application of the optimization algorithm for the 484 NHS bridges in District 3, it is shown that the algorithm systematically assigns higher priority to work plans that reduce safety risks of bridges, and to bridges with high traffic demand and long detour length to enhance their serviceability.
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