Full report on "Developing Crash Modification Factors for Separated Bicycle Lanes" has been posted by FHWA.
Dramatic and significant crash rate reductions when 'traditional' bike lanes are upgraded with buffers and delineators. https://highways.dot.gov/sites/fhwa.dot.gov/files/FHWA-HRT-23-078.pdf
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You may recall me sharing a shorter document a few months ago that summarized this paper in a slightly more digestible format. Here that it again: https://highways.dot.gov/sites/fhwa.dot.gov/files/FHWA-HRT-23-025.pdf
