accessibility standards for Federal outdoor developed areas 19 data from a sample of about 500 people who use manual wheelchairs, power wheelchairs, and scooters. The Center for Inclusive Design and Environmental Access in the School of Architecture and Planning, University at Buffalo, The State University of New York conducted the “Anthropometry of Wheeled Mobility Project.” The final report for this project is available at www.udeworld .com/documents/anthropometry/pdfs/AnthropometryofWheeledMobility Project_FinalReport.pdf. The report recommends that, in order to accommodate 95 percent of the users of manual wheelchairs, power wheelchairs, and scooters in the project sample, a minimum clear width of 43 inches is needed to make a 180-degree turn around a barrier similar to a chicane-style gate. Figure 3—Clearance needed to negotiate a 180-degree turn. 42" MIN (1065 mm) 42" MIN (1065 mm) 48" MIN (1220 mm) X ‹ 48” (1220 mm) (A) 180-DEGREE TURN 60" MIN (1525 mm) 36" MIN (915 mm) 36" MIN (915 mm) X ‹ 48” (1220 mm) (B) 180-DEGREE TURN (EXCEPTION)
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