Guidelines for Integrating Safety and Cost-Effectiveness into Resurfacing, Restoration, and Rehabilitation (3R) Projects (2021) / Chapter Skim
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Pages 11-18
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From page 11... ...
11 Process for 3R Project Development This chapter presents the process for development of 3R projects, including the identification of candidate 3R projects and the role of safety and traffic operational considerations in design decisions. 3.1 How Does the Design Process for 3R Projects Differ from That for New Construction and Reconstruction Projects?
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From page 12... ...
12 Guidelines for Integrating Safety and Cost-Effectiveness into Resurfacing, Restoration, and Rehabilitation (3R) Projects • An analysis of the traffic operational level of service (LOS)
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From page 13... ...
Process for 3R Project Development 13 Section 4.4 demonstrates that reliance on dimensional design criteria provides suboptimal results, with some investments made at locations where they are not cost-effective and other investments not made at locations where they would be cost-effective. 3.2 How Should Candidate 3R Projects Be Identified?
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From page 14... ...
14 Guidelines for Integrating Safety and Cost-Effectiveness into Resurfacing, Restoration, and Rehabilitation (3R) Projects 3.3 Assessment of Needs for Improvements in Addition to Resurfacing As noted earlier, there are three types of assessments that are generally conducted to investigate whether a design improvement is appropriate in conjunction with pavement resurfacing: • Review and analysis of crash history, • Traffic operational analysis, and • Cost-effectiveness analysis.
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From page 15... ...
Process for 3R Project Development 15 and shows the classification of a crash as head-on; sideswipe, opposite direction; sideswipe, same direction; angle; or rear end. Procedures for preparing collision diagrams are presented in HSM Chapter 5, "Diagnosis" (2)
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16 Guidelines for Integrating Safety and Cost-Effectiveness into Resurfacing, Restoration, and Rehabilitation (3R) Projects Figure 1.
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From page 17... ...
Process for 3R Project Development 17 Economic analyses are not typically needed as part of crash history reviews. The identification of what the highway agency considers to be a potentially correctable crash pattern, especially a pattern involving severe crashes, is sufficient justification to include a design improvement in a 3R project.
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From page 18... ...
18 Guidelines for Integrating Safety and Cost-Effectiveness into Resurfacing, Restoration, and Rehabilitation (3R) Projects review of crash history discussed in Section 3.3.1.
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