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EXTERIOR ROUTES |
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Floor and ground surfaces stable, firm and slip resistant. |
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Openings in floor or ground surfaces 1/2 inch maximum with long dimension perpendicular to direction of travel. |
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Vertical change in level 1/4 inch high maximum. |
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Changes in level greater than 1/2 inch ramped. |
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Abrupt changes in level exceeding 4 inches, vertical dimension shall be identified by warning curb. |
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Running and cross slopes at walking surfaces. Walks, sidewalks and ramps. |
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Vertical clearances/protrusions along circulation paths. |
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Site arrival points. An accessible route from parking, passenger loading zones, public streets and sidewalks to building entrance or facility. |
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Within a site. One accessible route connecting accessible buildings, accessible facilities, accessible elements, and accessible spaces. |
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Location of accessible routes coincides with general circulation paths. |
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Clear width of walking surface. |
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Contrasting stripe on upper approach and all treads. |
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No open risers on stairways. |
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Handrails on ramps and stairways. |
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Curb ramps, blended transitions and islands. |
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| Raised islands in crossings shall be cut through level with the street or have curb ramps at both sides. | 11B-406.6 |
| Installation and color of required detectable warnings. | 11B-705 |
| Passing spaces along accessible routes with a clear width less than 60 inches. | 11B-403.5.3 |
| Walks with continuous gradients have resting areas. | 11B-403.7 |
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