United States Department of Transportation
i
Separated Bike Lanes on Higher Speed Roadways: A Toolkit and Guide
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2024-06-01
[PDF-27.69 MB]
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Abstract:This toolkit includes information references, agency policies, processes, and other resources and procedures that can help agencies overcome the obstacles limiting them from implementing separated bicycle lanes where users most require separation from motor vehicles: on higher speed roads. Despite their importance in higher speed contexts, installations of separated bicycle lanes in the U.S. have so far occurred largely in lower speed environments. This toolkit defines separated bicycle lanes as (1) intended exclusively for bicyclists; (2) having a horizontal buffer that separates bicyclists from motor vehicle traffic; and (3) using some type of vertical element within that buffer space. Higher speed roadways were defined for the purpose of this guide as roadways with a posted speed limit of 35 mph or greater. This toolkit does not define an upper speed limit where shared-use paths separated from the roadways would be the preferred treatment. Speeds 50 mph or greater are most likely on limited-access roadways, which are not the focus of this guide. However, in general, the importance of horizontal and vertical separation of cyclists increases along with speed.
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