2016 California Standards for Accessible Design Pocket Guide - Eff. Jan. 1, 2017
11B-810.5.1 Slope.
Rail platforms shall not exceed a slope of 1:48 in all directions.
Exception: Where platforms serve vehicles operating on existing track or track laid in existing roadway, the slope of the platform parallel to the track shall be permitted to be equal to the slope (grade) of the roadway or existing track.
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