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Validation of the New Speed Zoning Method for Urban Arterials and High-Speed Roadways in Terms of Speed Compliance and Safety Outcomes
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2024-04-01
[PDF-16.20 MB]
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Edition:Final Report
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Abstract:This study presents the results of an analysis on the effects of Oregon’s speed zoning method on speed compliance and safety outcomes. Speed zones were selected in an urban area based on the availability of before and after speed data. Data for roadway context was collected, which included population, equity, land use, roadway, and exposure characteristics. The speed data was used to conduct a descriptive analysis that focused on key speed metrics to determine if the speed zone had an impact on speed compliance. A series of speed models were developed to identify significant relationships between observed speed and available explanatory variables. Lastly, Oregon crash data was used to assess the safety outcomes of the selected speed zones after the new speed limit sign was installed. This study concludes by providing a comprehensive conclusion and specific recommendations related to the results of the speed and safety analysis.
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