2022 California Standards for Accessible Design Guide (effective January 1, 2023)
11B-705.1.1.4 Resiliency.
Detectable warning surfaces shall differ from adjoining surfaces in resiliency or sound-on-cane contact.
Exception: Detectable warning surfaces at curb ramps, islands or cut-through medians shall not be required to comply with Section 11B-705.1.1.4.
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