This synthesis summarizes the state-of-the-art regarding the design, installation and effectiveness of detectable warning surfaces used in the U.S. and abroad. The need for a warning surface is documented. U.S. and international research on detectable warnings is reviewed. U.S. and international standards and guidelines for detectable warnings are presented. Use of detectable warnings in the U.S. and abroad is described, with illustrative case studies. Information is provided on U.S. detectable warning products and manufacturers. Jurisdictional recommendations for the use of truncated dome detectable warnings are summarized and illustrated.

This synthesis summarizes the state-of-the-art regarding the design, installation and effectiveness of detectable warning surfaces used in the U.S. and abroad. The need for a warning surface is documented. U.S. and international research on detectable warnings is reviewed. U.S. and international standards and guidelines for detectable warnings are presented. Use of detectable warnings in the U.S. and abroad is described, with illustrative case studies. Information is provided on U.S. detectable warning products and manufacturers. Jurisdictional recommendations for the use of truncated dome detectable warnings are summarized and illustrated.

The synthesis was developed under contract to the U.S. Access Board. It will be helpful to transportation engineers, planners, and other interested persons working to make public rights-of-way more accessible to people who have visual impairments.

Information about detectable warning products and installations comes from these sources. Information from the U.S. is based on input from individuals representing public and private agencies or businesses that have installed truncated dome detectable warnings. International information is based on input from individuals who are familiar with the development and regulatory history of warning surfaces in each country. Information on detectable warning products is based on interviews with company representatives and on company literature.

External Links:

More Information: www.access-board.gov/publications/DW%20Synthesis/report.htm

Further Reading:

dw_synthesis