May 20 2024
One of the key inputs to transportation asset management systems is the unit cost of each treatment. Costs associated with improving an asset consist of three components:
• Direct treatment costs: Cost of the treatment itself. This component includes just the pay items required to complete the treatment, such as the hot-mix asphalt (HMA) in a HMA overlay, or the concrete and reinforcement needed to construct a replacement concrete pavement.
• Direct project costs: Costs incurred as part of the construction project. These costs include traffic control, mobilization, ancillary features such as traffic signals and guardrail, etc.
• Indirect costs: Costs in advance of the project. This component includes Phase I studies, Phase II plan development, as well as any environmental investigations that may be needed. Also included in this component are utility relocations and land acquisition, and possibly costs associated with railroads.
The accuracy of the unit cost data is imperative to accurately managing a transportation system. If the costs are underestimated, the agency will program more work than can be accomplished. Anticipated conditions over time will be overstated as a result. This synthesis seeks to determine how transportation agencies are quantifying the direct and indirect treatment costs associated with improving assets, and the corresponding impact on their capital program as a whole.
Synthesis of Information Related to Highway Practices. Topic 54-22, Practices for Capturing Costs of Maintenance Operations in Maintenance Management Systems (Transportation Research Board), is similar but focuses on the maintenance side of asset management, particularly maintenance performed by the transportation agencies themselves.
Incorporating Cost Uncertainty and Path Dependence into Treatment Selection for Pavement Networks (Transportation Research Part C: Emerging Technologies, Volume 110, pp 40-55), begins at the next step after treatment unit costs have been developed and looks at the effect of uncertainty in cost on the cost-effectiveness of pavement network planning.
NCHRP Report 545, Analytical Tools for Asset Management, notes that a translation process is required to develop unit costs that are usable by most management systems. The proposed synthesis will be an important step toward closing that gap.
NCHRP 02-26, Implementation of Life-Cycle Planning Analysis in a Transportation Asset Management Framework, acknowledges the importance of treatment unit costs as an input to life-cycle planning, but does not go into detail on the development of the treatment costs themselves.
The objective of this research is to determine how transportation agencies are quantifying the direct and indirect treatment costs associated with improving assets as an input to their asset management systems, and the corresponding impact on their capital program as a whole.
Information to be gathered includes (but is not limited to):
• The components of an asset improvement project included in the budgets used in the asset management system, such as the construction project itself, preliminary engineering, land acquisition, etc.
• The source of treatment cost data, such as contract lettings, final design estimates, programming estimates, etc.
• The frequency of updating the treatment costs in the asset management system.
Proposed Research Activities: Information will be collected through a review of the 52 state agencies’ 2022/2023 Transportation Asset Management Plans, a survey of DOTs and other transportation agencies, and follow-up interviews with selected agencies for more detailed information. Information gaps and suggestions for research to address those gaps will be identified.
Susan Lime
treatment unit costs, asset management systems, direct costs, indirect costs, program costs
The research findings will assist transportation agencies in their development and use of comprehensive treatment unit costs as an input to life-cycle planning, enabling them to accurately project condition and therefore improve asset performance.
Very little detailed information on best practices related to treatment costs used in asset management systems exists, as noted below in the literature search summary. Yet the accuracy of treatment costs is of paramount importance in programming the proper amount of work that can be accomplished within given budgets and therefore in predicting asset performance into the future. The potential benefits of the research include agencies learning more accurate means of determining treatment unit costs, as well as identifying additional research needs to improve best practices nationwide.
The asset management engineer and others in an asset management section will be responsible for using the research results. Anyone involved in configuring the inputs to the asset management system, particularly with an eye toward getting the best possible outcomes, would be interested in the results of this research. The implementation would likely involve an improvement to existing processes rather than creating new processes.
a. Communication and Implementation Funding:
b. Communication and Implementation Period:
KEYWORDS/TERMS – treatment unit costs, asset management systems, direct costs, indirect costs, program costs