United States Department of Transportation
i
Enhanced Accounting for Item Cost Variability in AASHTOWare Project Software
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2024-08-01
[PDF-1.05 MB]
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Edition:Final Research Report (September 2022 – March 2023)
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Abstract:This study applies bootstrap analysis to historic transportation project item cost data to develop improved estimates of item cost confidence bounds for use in transportation project cost uncertainty analysis (a component of lifecycle analysis). Bootstrap regression results of confidence bounds will then be integrated into AASHTOWare Project Cost Estimator so that Monte Carlo procedures can estimate project-level confidence intervals for use in lifecycle project cost analysis and transportation capital planning. Data and functions contained within AASHTOWare (a cost estimation software licensed to the Departments of Transportation for over 40 states and the District of Columbia) are employed in the analyses. Coordinating with the Georgia Department of Transportation to obtain a research license for AASHTOWare took longer than expected, resulting in project delays. This report summarizes the work completed to date and describes the remaining steps required to finish the study and for the primary author to publish a final dissertation.
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