United States Department of Transportation
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Incorporating Data-Driven Safety Analysis in Traffic Impact Analyses: A How-To Guide
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2019-07-01
[PDF-4.83 MB]
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Abstract:Traditional crash and roadway analysis methods mostly rely on subjective or limited quantitative measures of safety performance. This dependence makes it challenging to calculate safety impacts alongside other criteria when planning projects. Data-Driven Safety Analysis (DDSA) employs newer, evidence-based models that provide State and local agencies with the means to quantify safety impacts similar to the way they do other impacts such as environmental effects, traffic operations, and pavement condition. DDSA provides reliable estimates of an existing or proposed roadway’s current and future safety performance and helps agencies make more informed decisions, better target investments, and reduce crashes occurring on their roadways. This guide demonstrates how transportation agencies and consultants can incorporate DDSA into routine traffic impact analyses (TIA).
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