Detectable Warnings: Detectability by Individuals with Visual Impairments, andSafety and Negotiability on Slopes for Persons with Physical Impairments

摘要

This report presents the results of research on human performance on detectablewarning surfaces. The first portion of the report presents an evaluation of the underfoot detectability of thirteen detectable warning surfaces by persons who are blind. The second portion is an evaluation of the safety and negotiability of nine detectable warning surfaces for persons having varied physical disabilities. Given the moderately increased level of difficulty which detectable warnings on slopes pose for persons with physical disabilities, it is desirable to limit the width of detectable warnings to no more than the required to provide effective warning for persons with visual impairments.