Crash modification factors (CMF) provide transportation professionals with the kind of quantitative information they need to make decisions on where best to invest limited safety funds.
The TRB National Cooperative Highway Research Program's pre-publication draft of NCHRP Research Report 991: Guidelines for the Development and Application of Crash Modification Factors describes a procedure for estimating the effect of a proposed treatment on a site of interest.
Four supplemental files will accompany the final version of this pre-pub: a CMF regression tool, a CMF combination tool, a slide summary, and an implementation memo.
Table of Contents
|Findings and Applications||5-107|
|Conclusions and Suggested Research||108-109|
|APPENDIX A: Procedure for Estimating the Effect of a Proposed Treatment at a Subject Site||114-216|
|APPENDIX B: Procedure for Estimating the Combined Safety Effect of Two Treatments||217-261|
|APPENDIX C: Guidelines for Developing Crash Modification Functions||262-374|
|APPENDIX D: User Guide for CMF Regression Software||375-391|
|APPENDIX E: User Guide for the CMF Combination Tool Spreadsheet||392-396|
|APPENDIX F: Enhancing Future CMF Research||397-413|
|APPENDIX G: Developing Consensus in Research Aboutthe Safety Effect of Manipulations||414-447|
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