2022 California Standards for Accessible Design Guide (effective January 1, 2023)
11B-406.5.9 Clear space at diagonal curb ramps.
The bottom of diagonal curb ramps shall have a clear space 48 inches (1219 mm) minimum outside active traffic lanes of the roadway. Diagonal curb ramps provided at marked crossings shall provide the 48 inches (1219 mm) minimum clear space within the markings.
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