2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)
11B-247 Detectable warnings and detectable directional texture
11B-247.1.1 General.
Detectable warnings shall be provided in accordance with Section 11B-247.1 and shall comply with Section 11B-705.1.
11B-247.1.2 Where required.
Detectable warnings shall be provided where required by Section 11B-247.1.2.
11B-247.1.2.1 Platform edges.
Platform boarding edges shall have detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.1.
11B-247.1.2.2 Curb ramps.
Curb ramps shall have detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.2.
11B-247.1.2.3 Islands or cut-through medians.
Islands or cut-through medians shall have detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.3.
11B-247.1.2.4 Bus stops.
Where detectable warnings are provided at bus stop boarding and alighting areas in compliance with Section 11B-810.2.3, detectable warnings shall comply with Sections 11B-705.1.1 and 11B-705.1.2.4.
11B-247.1.2.5 Blended transitions. Blended transitions shall have detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.5.
11B-247.1.2.6 Reflecting pools.
The edges of reflecting pools shall be protected by railings, walls, warning curbs or detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.6.
11B-247.1.2.7 Track crossings.
Where it is necessary to cross tracks to reach transit boarding platforms, detectable warnings complying with Sections 11B-705.1.1 and 11B-705.1.2.7 shall be provided.
11B-247.2 Detectable directional texture.
At transit boarding platforms, the pedestrian access shall be identified with a detectable directional texture complying with Section 11B-705.2.
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