| This report, the result of a study funded by the Access Board, provides a survey of detectable warning practices in the U.S. and abroad and summarizes the installation and effectiveness of various designs. Detectable warnings provide tactile cues at intersections, drop-offs, and other potential hazards to people with vision impairments. The report includes information on the need for detectable warning surfaces in public rights-of-ways, a review of research, guidelines, and standards on detectable warnings, product manufacturers, and recommendations. [150 pages] |