Incorporating Maintenance Costs and Considerations into Highway Design Decisions [MPC 23-494]
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2023-03-01
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Edition:Phase I and II
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Abstract:Maintenance costs, while significant throughout the life-cycle of a project, may sometimes not receive full consideration as inputs to design decisions. In Phase I, this project identified research priorities in coordination with the technical advisory committee (TAC) after recommendations were formulated based on reviews of published literature, design policies, and practice, as well as on a survey of design and maintenance personnel. As a result, four potential topics were selected for further exploration: maintenance and long-term costs for barriers, drainage, cross section elements and temporary control, and intersections/interchange form and design. Discussions with the TAC steered the conversation toward an initial big picture analysis of barrier systems and related costs extracted from different DOT databases. In Phase II, the research team accessed 10 years of detailed barrier-related work order data and transactional expenses from internal tracking and accounting systems. After data post-processing using custom search keys for free text fields and comparing different data sources, initial costs, maintenance costs, and project-related costs were extracted by barrier type. Work associated with barrier damage caused by vehicle crashes were available and quantified, but only for cable barriers due to limitations in reporting information in both work orders and accounting transactions. Adjustments for inflation using consumer price indices were applied to all costs for the analysis period, and a life-cycle cost analysis (LCAA) framework was illustrated for main barrier types.
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