United States Department of Transportation
i
Evaluation of Transportation Safety and Security Barriers in Bicyclist Accessibility
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2024-08-19
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[PDF-1.49 MB]
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Abstract:A continuation of automobile dependence over the past half-century within American cities has resulted in significant public health, environmental, and economic challenges. The further motivation of bicycling as a utilitarian and sustainable travel alternative has been identified as a viable solution to address societal concerns regarding physical inactivity, climate change, and transportation inequities. However, to date, a profound increase in bicycle mode shares in most communities remains elusive largely due to an inability to attract new bicyclists via the provision of safer bicycling infrastructure. This report, which is comprised of two studies, introduces a bicyclist routing platform that is sensitive to network barriers and the safety concerns shared by different types of bicyclists and implements the planning tool in eight Arizona metropolitan regions. In the first study, the Cyclist Routing Algorithm for Network Connectivity (CRANC) is designed to identify local and regional discrepancies in bicycling accessibility to jobs, schools, and grocery stores by integrating the concepts of bicyclist types and bicycle level of traffic stress into a new bicycling accessibility metric. In the second study, an analytic framework leveraging the CRANC tool is introduced to provide insights into the interrelationships between cycling accessibility along high-stress bike facilities and observed cyclist conflicts with motorists. In carrying out these studies, this research project intends to offer city officials and transportation researchers both a decision-support tool and the accompanying evidence needed to identify objective and perceived traffic safety barriers that are likely hindering a more widespread and equitable increase in bicycle mode adoption.
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