Performance Valuation Model for Urban Pavements
This paper summarizes the City of Saskatoon?s work in developing network level performance indicators for urban roadway networks with reporting that could be easily understood by politicians and the general public. Many years have been devoted to attempts at translating surface condition measures in to performance indicators. However, surface condition measures such as the International Roughness Index (IRI) were difficult for politicians and the general public to understand. The surface condition was also very dependent on the time of year that the data was collected. For instance, if collection occurred early in the year, certain roads would invariably be rated in worse condition due to spring thaw effects. This variability makes it difficult to track annual changes in condition of the networks. In fact, many have been observed to improve in condition without any work performed due to this variability. A more reliable evaluation tool was needed which could easily be understood with minimal or no roadway knowledge. With this criteria in mind, various asset valuation techniques were investigated. Many of the current methods such as straight line depreciation were rejected due to its inability to provide managers with the current value of the asset. The historical costs approach to valuation gives very little worth to old infrastructure assets, but is useful for valuing new assets. However, this method is not realistic because road infrastructure assets by their nature have sustainable value long after their intended ?design life?. Ultimately, a new method that uses probability distributions to account for variability in network value due to aging was developed. Treatment history and more important treatment sequencing have a significant affect on the long-term value of the assets.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Prang, Colin
- Berthelot, Curtis F
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Conference:
- Transportation Research Board 88th Annual Meeting
- Location: Washington DC, United States
- Date: 2009-1-11 to 2009-1-15
- Date: 2009
Language
- English
Media Info
- Media Type: DVD
- Features: Figures; Photos; References; Tables;
- Pagination: 15p
- Monograph Title: TRB 88th Annual Meeting Compendium of Papers DVD
Subject/Index Terms
- TRT Terms: Assets; Condition surveys; Evaluation and assessment; Pavement management systems; Pavement performance; Urban highways
- Identifier Terms: International Roughness Index
- Geographic Terms: Saskatoon (Canada)
- Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways;
Filing Info
- Accession Number: 01124769
- Record Type: Publication
- Report/Paper Numbers: 09-3637
- Files: TRIS, TRB
- Created Date: Mar 25 2009 7:38AM