A cast-in-place detectable warning surface is embedded in a concrete section sized per plan over compacted subgrade. The raised truncated domes feature a top diameter between 0.45 inches minimum and 0.47 inches maximum, a base diameter between 0.9 inches minimum and 0.92 inches maximum, and a height between 0.18 inches minimum and 0.22 inches maximum. The in-line dome pattern specifies a center-to-center spacing ranging from 2.3 inches minimum to 2.4 inches maximum.
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