United States Department of Transportation
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Development of risk-based decision methodology for facility design.
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2014-06-01
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[PDF-4.06 MB]
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Abstract:This report develops a methodology for CDOT to use in the risk analysis of various types of facilities and provides
illustrative examples for the use of the proposed framework. An overview of the current practices and applications to
illustrate the context from which the proposed methodology has been developed is presented first. Next, the report
introduces the proposed methodology for CDOT. In order to understand how the framework operates in practice, two
illustrative examples are presented. The first example demonstrates the framework through the context of allocating
resources for the operation and maintenance of a portfolio of signalized mast arms. Two risk assessment methods are
introduced through the first example, and it is shown that mast arms could benefit from varied inspection frequencies
based on current structural defects present. The second illustrative example uses the framework in the context of
making design decisions with regard to seismic hazard in Colorado. A quantitative risk assessment method is
introduced, and the illustration suggests that seismic hazard is not a controlling hazard in Colorado.
Implementation
Through the literature review and presented examples, CDOT is equipped with the resources and information
necessary to implement a risk-based methodology in decision-making across its organization. In the near term, the
report recommends the following action items for CDOT:
Implementation of a varied mast arm inspection routine based on structural state
Modification of the mast arm inspection records database to make information amenable to data-mining for
risk assessment
Adoption of the proposed common vocabulary and framework to discuss risk and address issues that face the
organization
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