Detectable warning surfaces
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Detectable warning surfaces color, contrast, and reflectance : final report. by

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Published by U.S. Dept. of Transportation, Office of Engineering Evaluations, National Technical Information Service [distributor in Washington, D.C, Springfield, VA .
Written in English


  • People with visual disabilities -- United States -- Transportation.,
  • Subway stations -- Barrier-free design -- United States.

Book details:

Edition Notes

ContributionsUnited States. Federal Transit Administration. Office of Engineering Evaluations.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL14667539M

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PROWAG: R Detectable Warning Surfaces. Designing Pedestrian Facilities for Accessibility Previous Next Module 4: Detectable Warning Surfaces Design Issues for Pedestrians with low vision and who are blind • US Access Board Video (click link below) – Low Vision 12 min. Detectable warnings shall consist of a surface of truncated domes aligned in a square or radial grid pattern and shall comply with R R Dome Size. Truncated domes in a detectable warning surface shall have a base diameter of 23 mm ( in) minimum to 36 mm ( in) maximum, a top diameter of 50 percent of the base diameter minimum to 65 percent of the base diameter maximum, . Regulatory-compliant cast iron Detectable Warning Plates from Neenah Foundry offer appealing aesthetics, exceptional longevity and freedom from maintenance. By using Neenah's Detectable Warning Plates, specifiers can be confident that the critical warning message will be delivered for the lifetime of the installation. Armor-Tile ® Cast in Place is the world leader in tactile detectable warning systems packaged into the lowest cost installation system available. Cast in Place tiles can be easily installed directly into wet set concrete and can be easily replaced when necessary. We manufacture our tactile walking surface indicators using a diamond-hard vitrified polymer composite that is the industry leader.

The warning surfaces need to consist of a series of tactile domes over a radial, square, or rectangular grid that complies with the ADA requirements. The warning surface must be a minimum of 24 inches long in the direction of travel and extend the entire width on the surface where they are being installed. Detectable warning surfaces – also called tactile warning surfaces – are a standardized surface feature built within or applied onto walking surfaces and other travel ways. They provide three distinct types of sensory signals to visually and none visually impaired pedestrians as they transition from a safe path of travel into a potentially. Detectable warnings provide a distinctive surface pattern of truncated domes that serves as a “tactile” cue to persons with vision impairments, alerting them that they’re walking into a hazardous vehicular area or change of grade. Detectable warnings are installed on crosswalks, wheelchair ramps, by reflecting pools and on transit platforms. A detectable warning surface features a pattern of domes that alerts a person with visual impairments or other disabilities to oncoming traffic or other hazards. It can be felt by foot or when using a cane, wheelchair, or scooter, and it indicates flush boundaries at curb ramps, between pedestrian and vehicular routes, and unprotected drop-off areas at public transportation stations and stops.