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Bicycles -- United States -- Safety measures, Traffic signs and signals


The research consisted of two phases: 1) a synthesis of practice and 2) and analysis of cyclist performance characteristics. The synthesis of current practice reviewed the literature, current engineering design and operational guidance documents, and surveyed the jurisdictions about their current deployments of bicyclespecific signals. This report summarizes research of cyclist behavior at signalized intersections in Portland, Eugene, Corvallis, Beaverton and Clackamas County, OR. These signals had both bicycle-specific indications and vehicle-only signals. A total of 4,673cyclists were observed. For each cyclist observed arriving on red, a set of descriptive variables were collected (e.g., age, sex, helmet use, presence of cargo, arrival in group). Timebased event data were collected to establish reaction times, crossing times, waiting time, gap acceptance, and saturation flow rates. Compliance behavior was also established for these cyclists.


This is a final report, FHWA-OR-RD-14-06, from the NITC program of TREC at Portland State University, and can be found online at:



Persistent Identifier

Interim Report #1.pdf (6619 kB)
The purpose of this report is to summarize the relevant design and related guidance for bicycle-specific traffic signals, the existing published literature, and the results of a survey of installed bicycle-specific traffic signals in North America. This interim report contains the following four chapters: Background – A summary of relevant design manuals, legislation, and policy Literature Review – A synthesis of published literature related to bicycle-specific traffic signals. State of the Practice – A summary of our survey of known installations of bicycle-specific traffic signals, mostly in the U.S. but with a handful of Canadian jurisdictions. Research Needs – Based on the results of the above reviews, a discussion of the identified research needs.