Risk Assessment for Bridge Management Systems

National Cooperative Highway Research Program (NCHRP) Project 20-07, Task 378 was commissioned by the American Association of State Highway and Transportation Officials (AASHTO) Subcommittee on Bridges and Structures to develop a Guideline for Risk Assessment for Bridge Management Systems, to be used within a bridge management system (BMS) to estimate the beneficial effects of bridge risk mitigation and replacement on transportation performance, as a part of methods for project utility and benefit–cost analysis. AASHTOWare Bridge Management was explicitly targeted, but the methodology is intended to be usable with any BMS using the data typically collected by, or available to, U.S. highway agencies. The final guideline, dated September 2016, which will not be published, but is available from NCHRP as a PDF file, describes methods for developing service disruption scenarios, and then estimating the likelihood and consequences of these scenarios. Likelihood probability models are provided for 16 hazards including earthquake, landslide, storm surge, high wind, flood, scour, wildfire, temperature extremes, permafrost instability, overload, over-height collision, truck collision, vessel collision, sabotage, advanced deterioration, and fatigue. Consequences of service disruption are estimated in dollars for recovery cost, safety, mobility, and environmental sustainability. All of these models are based on published research gathered from a wide variety of sources, and consistent with the AASHTO Guide for User and Non-User Benefit Analysis for Highways. The economic basis for risk assessment is designed to be compatible with existing use of life-cycle cost analysis in BMS, as well as with the utility framework provided in AASHTOWare Bridge Management. This paper introduces the methodology to inform the bridge management community of the new resource soon to be available.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 43-56
  • Monograph Title: Eleventh International Bridge and Structures Management Conference
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01672040
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Jun 14 2018 8:53AM