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Bridge Project Prioritization, Bryan Gibson, Christopher Van Dyke, Sudhir Palle, Ryan Griffith, Doug Kreis
Bridge Project Prioritization, Bryan Gibson, Christopher Van Dyke, Sudhir Palle, Ryan Griffith, Doug Kreis
Kentucky Transportation Center Research Report
Kentucky’s 14,000+ bridges are key nodes within the state’s surface transportation network. They facilitate the movement of freight, commercial vehicles, and personal vehicles alike. Historically, the Kentucky Transportation Cabinet (KYTC) has prioritized bridge maintenance projects using sufficiency ratings. These ratings are based on three factors — structural adequacy and safety, design obsolescence, and an asset’s importance within the roadway network. Although useful, sufficiency ratings do not account for factors that should be considered during the prioritization process (e.g., condition factors, risk). To address the shortcomings associated with using sufficiency ratings, KYTC — with the assistance of the Kentucky Transportation Center …
Steel Bridge Coating Inventory For 2022, Christopher Goff, Sudhir Palle
Steel Bridge Coating Inventory For 2022, Christopher Goff, Sudhir Palle
Kentucky Transportation Center Research Report
The Kentucky Transportation Cabinet (KYTC) has replaced the lead-based coatings on many of its steel bridges over the past 30 years. In the 1980s and 1990s, inorganic zinc primers with vinyl topcoats were the go-to option for coating replacement projects. Since 2000, the typical choice for these projects has been organic zinc primers that are part of a two- or three-coat system. Some of these coatings have localized failures in high-stress areas. KYTC’s current inventory of steel bridges numbers over 1,100 structures. Accounting for expected service lives, to properly maintain protective coatings on these bridges will require the Cabinet to …