United States Department of Transportation
i
Safety Analysis Needs Assessment for Transportation Systems Management and Operations
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2019-10-01
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[PDF-6.58 MB]
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Abstract:This report documents a safety analysis needs assessment for Transportation Systems Management and Operations (TSMO). It includes the following key content: syntheses of strategy-specific safety performance knowledge and capabilities (Chapter 2), a synthesis of research on interrelationships between measures of traffic operational performance and safety performance (Chapter 3), a synthesis of research relating weather and weather-related road conditions to safety performance (Chapter 4), a synthesis of research, tools, and challenges in estimating safety performance effects of TSMO that result from changes in travel choices and traffic demand patterns (Chapter 5), and TSMO-related safety performance analysis gaps, limitations, and needs (Chapter 6). The literature contains various types of safety performance evaluations for some TSMO strategies. However, there are only a limited number of published safety performance evaluations that are robust enough to inform future evaluations and/or the development of quantitative safety performance predictions. There is a need for safety and operations staff from local, State, and Federal agencies, as well as researchers and other stakeholders, to engage in regular dialog on safety performance evaluation needs and priorities specific to TSMO strategies. The needs assessment also identified five categories of methodological needs for analyzing the safety performance of TSMO: 1) “sub-annual” safety data collection and analysis, 2) safety performance effects beyond the site level, 3) safety performance effects of operational conditions, 4) study design and statistical analysis, and 5) mechanistic approaches to safety performance analysis of TSMO. The report concludes with recommended next steps in continuing to advance safety performance analysis capabilities of TSMO. Readers of this report will gain an increased understanding of existing knowledge, analysis methods, and research needs in the context of quantifying the safety performance effects of TSMO.
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