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R301.3.4 Width at Doors, Doorways, and Gates. The pedestrian access route <br />through doors, doorways, and gates shall be permitted to comply with R411.2.3. <br />R301.4 Walkway Grade and Cross Slope. <br />R301.4.1 Cross Slope. The cross slope of the walkway of a pedestrian access <br />route shall be 2 percent maximum. <br />R301.4.2 Street or Highway Grade. Where the walkway of a pedestrian access <br />route is contained within a street or highway border, its grade shall not exceed the <br />general grade established for the adjacent street or highway. <br />R301.4.3 Supported Slope. Where the walkway of a pedestrian access route is <br />supported by a structure, it shall comply with R305.5. <br />Advisory R301.4.3 Supported Slope. This provision covers pedestrian access routes on <br />bridges, overpasses, underpasses and similar facilities. <br />R301.5 Surface. The surface of the pedestrian access route shall be firm, stable and slip <br />resistant. <br />Advisory R301.5 Surface. The U.S. Department of Justice ADA regulations require that <br />the usability of accessible features be maintained (28 CFR §35.133 and §36.211).- <br />R301.5.1 Vertical Alignment. Vertical alignment shall be planar within curb <br />ramp runs, blended transitions, landings, and gutter areas within the pedestrian <br />access route, and within clear spaces required for accessible pedestrian signals, <br />street furniture, and operable parts. Grade breaks shall be flush. Where the <br />pedestrian access route crosses rail tracks at grade, the surface of the pedestrian <br />access route shall be level and flush with the top of the rail at the outer edges of <br />the rail. The surface between the rails shall be aligned with the top of the rail. <br />R301.5.2 Surface Discontinuities. Surface discontinuities shall not exceed 13 <br />mm (0.50 in) maximum. Vertical discontinuities between 6.4 mm (0.25 in) and <br />13 mm (0.5 in) maximum shall be beveled at 1:2 minimum. The bevel shall be <br />applied across the entire level change. <br />Advisory R301.5.2 Surface Discontinuities. Surfaces with individual units laid out of <br />plane and those that are heavily textured, rough, or chamfered, will greatly increase <br />rolling resistance and will subject pedestrians who use wheelchairs, scooters, and rolling <br />walkers to the stressful (and often painful) effects of vibration. It is highly desirable to <br />minimize surface discontinuities; when discontinuities on the pedestrian access route are <br />unavoidable, they should be widely separated. <br />R301.7 Horizontal Openings. <br />32 <br />