Developing a Guide for Quantitative Approaches to Systemic Safety Analysis (2020) / Chapter Skim
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Pages 38-51
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31 Agency Survey of Practice This section summarizes the current state of practice of systemic safety analysis. Early in the research project a web-based survey was conducted that targeted state, county, and local safety engineers to learn about the experiences of highway agencies implementing quantitative approaches to systemic safety.
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32 3. What types of safety analyses does your agency perform in deciding what site-specific safety improvements should be made (check all that apply)
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33 5. If you checked YES to Systemic Safety Analysis in Question 3, the following safety analysis tools may have some systemic safety analysis features.
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34 MS Excel, mobility (by County Road Administration Board) , and information provided by State DOT.
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35 Network screening for specific crash types that fit specific countermeasures (e.g., RD Plan, Intersection Plan) , Modified usRAP (draft study status)
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36 9. If you checked YES to Systemic Safety Analysis in Question 3, what advantages has your agency derived from implementing systemic safety analysis (check all that apply)
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37 10. If you checked YES to Systemic Safety Analysis in Question 3, what are some of the lessons your agency has learned in implementing systemic safety analysis: Responses: Observationally, it appears that the more locations you can touch, the better the performance in terms of fatal and serious-injury crash reduction.
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38 Take care in initial database development segmentation. Make appropriate determination of data collection methods and precision needed to achieve goals of the program.
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39 Naive before-after analysis. We are in the process of implementing a statewide systemic lighting retrofit project for bicyclists and pedestrians.
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40 Identified improvements are added to Capital Improvements Projects or Safety Improvement Project list depending on estimated cost of implementation. As these projects are funded and installed, they are removed from the respective lists.
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41 Lack of guidance on how to conduct quantitative systemic safety analysis 30.6% (19) Lack of knowledge to determine appropriate proportion of funding to support traditional crash-data based methods and systemic safety analysis for programming safety improvements 25.8% (16)
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42 Right-of-way issues. Our FHWA Division Office requires survey to ensure all work (even things like centerline rumble strips)
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43 AASHTO is too expensive for local agencies so less expensive software. I am not very familiar with usRAP.
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44 Our agency is partnering with our local university to develop crash-type-specific SPFs that will likely help us in future safety analysis. Numetric.
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