Guidelines for Guardrail Implementation

Transportation Research Board
June 2009



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 D, Guardrail Use Guidelines for Benefit/Cost = 1

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

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