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ADA Requirements

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halla-dillon
29 diapositives · 1.1K Views · Nov 06, 2014

ADA Requirements. Well-designed sidewalks meet ADA requirements: Sidewalks should be wide & clear of obstructions (4’ minimum clearance); Sidewalk surface should be smooth; Sidewalk surface should be at 2% max cross-slope; Sidewalk surface should be level and continue across driveways.

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ADA Requirements
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  1. ADA Requirements • Well-designed sidewalks meet ADA requirements: • Sidewalks should be wide & clear of obstructions (4’ minimum clearance); • Sidewalk surface should be smooth; • Sidewalk surface should be at 2% max cross-slope; • 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.

  2. Sidewalk Slopes PROWAG (R303) ADAAG (4.8)

  3. Sidewalk Grade PROWAG (R301) ADAAG (4.3.7) Sidewalks adjacent to an existing roadway may follow the running grade of the roadway • 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

  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

  5. Sidewalk Grade PROWAG (R303) 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.

  6. Cross Slope PROWAG (R303) ADAAG (4.8) Steep cross slopes are more slippery when wet, icy, or snowy

  7. Cross Slope PROWAG (R303) ADAAG (4.8) Elevation change occurs in the furniture zone 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

  8. Sidewalk Slopes

  9. Sidewalk Slopes

  10. Sidewalk Slopes ADA BEST PRACTICE

  11. Driveway Crossings PROWAG (R301.4.1) ADAAG (4.8)

  12. Driveway Crossings PROWAG (R301.4.1) ADAAG (4.8) Sidewalk continues at level, at full width, through driveway

  13. Driveway Crossings Easiest way to maintain level passage Withseparated sidewalks

  14. Driveway Crossings Driveways built like intersections encourage high-speed turns

  15. Driveway Crossings Driveways built like driveways encourage slow-speed turns

  16. Driveway Crossings PROWAG (R301.4.1) ADAAG (4.8)

  17. Crosswalks PROWAG (R301.4.2) ADAAG (4.8) Crosswalks are part of the accessible route; normal ADAAG provisions apply (except at mid-block crossings): • 2% maximum cross slope • 5% maximum running grade • 6’ minimum (MUTCD) ADA does not require the use of pavement markings.

  18. Crosswalks PROWAG (R301.4.2) ADAAG (4.8) 5% max 2% max

  19. Side Flares PROWAG (R303.2.1.4) ADAAG (4.7.5)

  20. Side Flares PROWAG (R303.2.1.4) ADAAG (4.7.5) 10%

  21. Side Flares PROWAG (R303.2.1.4) ADAAG (4.7.5)

  22. Side Flares PROWAG (R303.2.1.4) ADAAG (4.7.5)

  23. Ramp Alignment PROWAG (R303.3.4)

  24. Ramp Alignment PROWAG (R303.3.4)

  25. Ramp Alignment PROWAG (R303.3.4)

  26. Ramp Alignment PROWAG (R303.3.4)

  27. Level Landing All turning movements should be at 2% max

  28. Clear Space PROWAG (R303.3.6) ADAAG (4.7.10) 4 ft

  29. Clear Space PROWAG (R303.3.6) ADAAG (4.7.10)