Safety Prediction Methodology and Analysis Tool for Freeways and Interchanges

National Academies of Sciences, Engineering, and Medicine

doi:10.17226/26367

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Safety Prediction Methodology and Analysis Tool for Freeways and Interchanges

(2021)

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Prior to this research project, state highway agencies did not have tools for reflecting safety in their decisions concerning freeway and interchange projects.

The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 306: Safety Prediction Methodology and Analysis Tool for Freeways and Interchanges documents a safety prediction method for freeways that is suitable for incorporation in the Highway Safety Manual. Within the document are Appendices A through F: Practitioner Interviews, Database Enhancement, Proposed HSM Freeways Chapter, Proposed HSM Ramps Chapter, Proposed HSM Appendix B for Part C, and Algorithm Description.

Supplemental to the document are an Enhanced Safety Analysis Tool, a User Manual for the Tool, a Workshop Agenda, an Instructor Guide, and a PowerPoint Presentation.

Contributor(s): National Academies of Sciences, Engineering, and Medicine; Transportation Research Board; National Cooperative Highway Research Program; James A. Bonneson; Srinivas Geedipally; Michael P. Pratt; Dominique Lord

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National Academies of Sciences, Engineering, and Medicine. 2021. Safety Prediction Methodology and Analysis Tool for Freeways and Interchanges. Washington, DC: The National Academies Press. https://doi.org/10.17226/26367.

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Publication Info

765 pages | 8.5 x 11 | DOI: https://doi.org/10.17226/26367

Chapters		skim
Front Matter	i-xi
SUMMARY	1-2
CHAPTER 1: INTRODUCTION	3-4
CHAPTER 2: LITERATURE REVIEW	5-56
CHAPTER 3: FRAMEWORK FOR SAFETY PREDICTION	57-68
CHAPTER 4: DATABASE DEVELOPMENT	69-99
CHAPTER 5: PREDICTIVE MODEL FOR FREEWAY SEGMENTS	100-180
CHAPTER 6: PREDICTIVE MODEL FOR RAMP SEGMENTS	181-234
CHAPTER 7: PREDICTIVE MODEL FOR CROSSROAD RAMP TERMINALS	235-318
CHAPTER 8: SEVERITY DISTRIBUTION FUNCTIONS	319-348
CHAPTER 9: CONCLUSIONS AND RECOMMENDATIONS	349-350
REFERENCES	351-362
APPENDIX A: PRACTITIONER INTERVIEWS	363-371
APPENDIX B: DATABASE ENHANCEMENT	372-384
APPENDIX C: PROPOSED HSM FREEWAYS CHAPTER	385-522
APPENDIX D: PROPOSED HSM RAMPS CHAPTER	523-692
APPENDIX E PROPOSED HSM APPENDIX B FOR PART C	693-726
APPENDIX F: ALGORITHM DESCRIPTION	727-753

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