United States Department of Transportation
i
Developing a Culvert Inspection Manual and Estimating Culverts’ Deterioration Curve, Inspection Frequency and Service Life for UDOT
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2023-02-01
[PDF-4.10 MB]
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Edition:Final Report, August 2021 to December 2022
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Abstract:Culverts are among the most important assets of state transportation departments. As culvert inspection and maintenance are critical to the safe operation of transportation infrastructure systems and preventing injuries, human life losses, and heavy financial losses, they should be inspected and maintained regularly. Several state DOTs and the American Association of State Highway and Transportation Officials (AASHTO) have published culvert inspection and asset management manuals, which vary widely between states. Despite the effectiveness of these guidelines and manuals, different states consider different qualitative and quantitative parameters, which means that they are specific to each state and may not apply to Utah's culverts. To this end, the purpose of this research is to help UDOT develop a comprehensive system of culvert management by producing a Utah culvert management manual. The research's objectives are threefold: (1) develop a comprehensive inspection and asset management manual for culverts in Utah based on specific characteristics, (2) estimate the deterioration curves for UDOT culverts, and (3) predict the frequency and service life of UDOT culverts. Based on culvert inventories from Colorado, Utah, and Vermont, the final curves were generated using Support Vector Regression (SVR) and Random Forest Regression (RFR) algorithms. Estimating the final deterioration curve for culverts in Utah can be done using the combination of the inventories. After determining the likelihood of failure based on Utah's final culvert deterioration curve, a risk-based prioritization approach was used to determine the frequency of culvert inspections. The final stages of research included generating the final deterioration curve based on the three culvert inventories for Utah's culverts, as well as developing a culvert management manual. In developing the Culvert/Storm Drain Management Manual for Utah, the contents of other states' manuals and federal guidelines for culvert inspection and maintenance were combined and modified for Utah.
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