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TRB’s National Cooperative Highway Research Program (NCHRP) Report 638: Guidelines for Guardrail Implementation explores guidance on selecting the appropriate barrier performance level for the installation of longitudinal barriers.

The following appendices to NCHRP Report 638 are only available online.

• Appendix A, Guardrail Use Guidelines for Benefit/Cost = 2

• Appendix B, Guardrail Use Guidelines for Benefit/Cost = 3

• Appendix C, Guardrail Use Guidelines for Benefit/Cost = 4

• Appendix D, Guardrail Use Guidelines for Benefit/Cost = 1

Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2009. Guidelines for Guardrail Implementation. Washington, DC: The National Academies Press. https://doi.org/10.17226/14273.

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Publication Info

30 pages |  8.5 x 11 |  DOI: https://doi.org/10.17226/14273
Chapters skim
Front Matter i-vii
Chapter 1 - Introduction 1-1
Chapter 2 - Literature Review 2-10
Chapter 3 - Research Approach 11-11
Chapter 4 - RSAP Input 12-17
Chapter 5 - Benefit/Cost Analysis 18-20
Chapter 6 - Route-Specific Selection Guidelines 21-24
Chapter 7 - Supplemental Analysis Procedures 25-27
Chapter 8 - Conclusions and Recommendations 28-28
References 29-29
Appendices 30-30
Abbreviations used without definitions in TRB publications 31-31

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