In urban areas, bicycles that travel in bicycle lanes encounter a variety of obstructions, including pedestrians and various types of motor vehicles. Earlier studies focused on the frequency of such events. The goal of this study was to characterize the obstructions. Data were collected in the Manhattan and Brooklyn boroughs of New York City to evaluate specific characteristics (e.g., bicycle lane designs, curb regulations, land use) that might influence the frequency of specific conflict types. A method is described for evaluating the frequency of conflicts between bicycles that travel in on-street bicycle lanes and various other transportation modes and for identifying factors that might affect the frequency of such conflicts.
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