Detectable warning surfaces feature an array of truncated domes with a height of zero point two inches and tapered edges where exposed. The domes are arranged in a pattern with base spacing of zero point nine inches and top spacing of zero point four-five inches. The overall width of the warning path is thirty-six inches minimum, with dome center-to-center spacings ranging from one point six inches minimum to two point four inches maximum in both directions. Color of the truncated domes is specified as yellow as approved by the landscape architect. Continuous detectable warnings thirty-six inches wide are required where walking surfaces adjoin vehicular ways without intervening curbs or railings.
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