Extreme weather events and a changing climate increasingly boost costs to transportation agencies and to the traveling public. While Departments of Transportation (DOTs) are taking into account changing climate and extreme weather when making infrastructure decisions, they typically are not using a formal set of tools or cost-benefit analyses (CBAs) to address climate resilience because they may be too time-consuming and expensive to conduct routinely.
The TRB National Cooperative Highway Research Program's NCHRP Research Report 938: Incorporating the Costs and Benefits of Adaptation Measures in Preparation for Extreme Weather Events and Climate Change—Guidebook was developed to try to fill the gaps identified by DOTs. It is intended to provide a consolidated resource for transportation practitioners to be able to more readily consider CBAs as a tool in their investment-decision making processes when considering different climate and extreme weather adaptation alternatives.
This report has additional resources, including a web-only document NCHRP Web-Only Document 271: Guidelines to Incorporate the Costs andBenefits of Adaptation Measures in Preparation for Extreme Weather Events and Climate Change, a Power Point presentation that describes the research and the results, a spreadsheet tool that provides an approximate test to see if it would be cost-effective to upgrade assets to the future conditions posed by climate change, and a spreadsheet tool that uses existing conditions without climate change only to calculate the new return period for future conditions with climate change.
National Academies of Sciences, Engineering, and Medicine. 2020. Incorporating the Costs and Benefits of Adaptation Measures in Preparation for Extreme Weather Events and Climate Change—Guidebook. Washington, DC: The National Academies Press. https://doi.org/10.17226/25744.
|Chapter 1 - Introduction||3-5|
|Chapter 2 - Cost-Benefit Analysis Overview||6-20|
|Chapter 3 - Climate Considerations||21-36|
|Chapter 4 - Common Costs||37-40|
|Chapter 5 - Common Benefits||41-54|
|Chapter 6 - Conducting a Cost-Benefit Analysis||55-67|
|Chapter 7 - Study Level 1 Climate Resilience Cost-Benefit Analysis||68-87|
|Chapter 8 - Study Level 2 Climate Resilience Cost-Benefit Analysis||88-102|
|Appendix A - Discount Rate Information||105-111|
|Appendix B - Present Value Interest Factor Table||112-112|
|Appendix C - Climate Information, Design Guidelines, and Data Sources||113-124|
|Appendix D - Cost Worksheet||125-125|
|Appendix E - Cost-Estimating Tools||126-127|
|Appendix F - Unknown Recurrence Interval Calculator Tools||128-128|
|Appendix G - Worksheet for Level 1 Analysis||129-140|
|Appendix H - Worksheet for Level 2 Analysis||141-152|
|Appendix I - Blank Level 1 Worksheet||153-161|
|Appendix J - Cost-Benefit Analysis Data Sources||162-164|
|Appendix K - Cost-Benefit Analysis Tools||165-173|
|Appendix L - Existing Frameworks Related to the Cost-Benefit Analysis Process||174-174|
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