ada requirements well-designed sidewalks meet ada requirements: sidewalks should be wide & clear...
Post on 27-Mar-2015
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ADA Requirements Well-designed sidewalks meet ADA requirements: Sidewalks should be wide & clear of obstructions (4 minimum clearance); Sidewalks should be wide & clear of obstructions (4 minimum clearance); Sidewalk surface should be smooth; Sidewalk surface should be smooth; Sidewalk surface should be at 2% max cross-slope; Sidewalk surface should be at 2% max cross-slope; Sidewalk surface should be level and continue across driveways. Sidewalk surface should be level and continue across driveways. Separating sidewalks from traffic creates a safer and more pleasant place to walk; and makes it easier to meet all ADA requirements. Slide 2 Maximum Cross SlopeMaximum Ramp Slope 2.0%8.3% PROWAG (R303) ADAAG (4.8) Sidewalk Slopes Slide 3 Sidewalk Grade 5% maximum grade away from roadways Away from roadways, facilities with grades greater than 5% must be treated as a ramp as outlined in ADAAG: 8.3% max for maximum rise of 30 with 5 by 5 level landings between segments At 8.3% grade, 30 of rise = 30 long Sidewalks adjacent to an existing roadway may follow the running grade of the roadway PROWAG (R301) ADAAG (4.3.7) Slide 4 Sidewalk Grade Reducing the impacts of steep or long grades Provide signs that indicate: grade and length alternative routes with lesser grades Provide handrails where possible A handrail for use along a grade can have large openings, unlike a pedestrian rail on a bridge or retaining wall Slide 5 Sidewalk Grade Chasing Grade "R303.2.1.1 Running Slope. The running slope shall be 5 percent minimum and 8.3 percent maximum but shall not require the ramp length to exceed 4.5 m (15.0 ft)." When chasing a grade, a ramp slope greater than 8.3% is allowable if 8.3% does not meet the existing sidewalk grade in 15 feet or less. The ramp will be at whatever running grade gets you from the street gutter grade at the curb to the existing sidewalk 15 feet away. PROWAG (R303) Slide 6 Cross Slope Steep cross slopes are more slippery when wet, icy, or snowy PROWAG (R303) ADAAG (4.8) Slide 7 Good Design: Concrete in the pedestrian zone, textured surface in the furniture zone This provides a visual contrast of surfaces Watch for bus stops if you use this design so assure ADA standards are still met Cross Slope Elevation change occurs in the furniture zone PROWAG (R303) ADAAG (4.8) Slide 8 Sidewalk Slopes Slide 9 Slide 10 BEST PRACTICE ADA Sidewalk Slopes Slide 11 PROWAG (R301.4.1) ADAAG (4.8) Driveway Crossings Slide 12 Sidewalk continues at level, at full width, through driveway Driveway Crossings PROWAG (R301.4.1) ADAAG (4.8) Slide 13 Easiest way to maintain level passage With separated sidewalks Driveway Crossings Slide 14 Driveways built like intersections encourage high-speed turns Driveway Crossings Slide 15 Driveways built like driveways encourage slow-speed turns Driveway Crossings Slide 16 PROWAG (R301.4.1) ADAAG (4.8) Driveway Crossings Slide 17 2% maximum cross slope 5% maximum running grade 6 minimum (MUTCD) Crosswalks Crosswalks are part of the accessible route; normal ADAAG provisions apply (except at mid-block crossings): ADA does not require the use of pavement markings. PROWAG (R301.4.2) ADAAG (4.8) Slide 18 Crosswalks 5% max 2% max PROWAG (R301.4.2) ADAAG (4.8) Slide 19 PROWAG (R303.2.1.4) ADAAG (4.7.5) Side Flares Slide 20 PROWAG (R303.2.1.4) ADAAG (4.7.5) 10% Slide 21 Side Flares PROWAG (R303.2.1.4) ADAAG (4.7.5) Slide 22 Side Flares PROWAG (R303.2.1.4) ADAAG (4.7.5) Slide 23 PROWAG (R303.3.4) Ramp Alignment Slide 24 PROWAG (R303.3.4) Slide 25 Ramp Alignment PROWAG (R303.3.4) Slide 26 Ramp Alignment PROWAG (R303.3.4) Slide 27 Level Landing All turning movements should be at 2% max Slide 28 PROWAG (R303.3.6) ADAAG (4.7.10) Clear Space 4 ft Slide 29 PROWAG (R303.3.6) ADAAG (4.7.10) Clear Space