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Detectable Warnings

Detectable Warnings. PROWAG (R304.2.1). X. GRADE BREAK. Correct Placement if X > 5 feet. Correct Placement if X < 5 feet. Detectable Warnings. PROWAG (Advisory R304.2.3).

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Detectable Warnings

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  1. Detectable Warnings PROWAG (R304.2.1) X GRADE BREAK Correct Placement if X > 5 feet Correct Placement if X < 5 feet

  2. Detectable Warnings PROWAG (Advisory R304.2.3) “… the vertical rows of truncated domes in a detectable warning surface should be aligned to perpendicular or radial to the grade break…”

  3. Detectable Warnings PROWAG (R304) ADAAG (4.29) Avoid gaps in detectable warnings

  4. Detectable Warnings PROWAG (R304) ADAAG (4.29) “Detectable warning surfaces shall contrast visually with adjacent… walkway surfaces, either light-on-dark or dark-on-light.”

  5. Detectable Warnings PROWAG (R304) ADAAG (4.29) Detectable warnings are not wayfinding devices. This application has a gap.

  6. Detectable Warnings PROWAG (R304) ADAAG (4.29) Does this meet ADA?

  7. Detectable Warnings PROWAG (R221) ADAAG (4.29) “The overuse of detectable warning surfaces should be avoided in the interests of message clarity. However, where commercial driveways are provided with traffic control devices or otherwise are permitted to operate like public streets, detectable warnings should be provided at the junction between the pedestrian route and the street.”

  8. Detectable Warnings MDOT Special Provision 03SP803(A) “Do not construct detectable warnings by forming or stamping in newly cast concrete.”

  9. Changes in Level PROWAG (R301.5.2) ADAAG (4.5.2)

  10. Changes in Level PROWAG (R301.5.2) ADAAG (4.5.2)

  11. Gaps and Grates PROWAG (R301.7) ADAAG (4.5.4) “Gratings… shall have spaces no greater than ½” wide in one direction.” “Gratings… shall be placed so that the long dimension is perpendicular to the dominant direction of travel .”

  12. Bridge Joints PROWAG (R301.7.1) ADAAG (4.5.4) “Openings shall not permit passage of a sphere more than ½” in diameter.”

  13. Bridge Joints PROWAG (R301.7.1) ADAAG (4.5.4) A properly installed bridge expansion device covers the gap

  14. Protruding Objects PROWAG (R401) ADAAG (4.4.1)

  15. Bus Pads PROWAG (R410) ADAAG (10.2.1)

  16. Bus Pads PROWAG (R410) ADAAG (10.2.1) Buses often need additional room for loading

  17. Parking PROWAG (R216, R308) On-Street Parking ADAAG does not specifically address on-street parking. Local jurisdictions should look to the PROWAG to provide accessible on-street parking. PROWAG: Where on-street parking is marked or metered, accessible parking spaces complying with R308 shall be provided on the block perimeter…

  18. Accessible Ped Signals (APS) PROWAG (R306.2) WHAT ARE ACCESSIBLE PEDESTRIAN SIGNALS? Section 4E.06 of the MUTCD: “A device that communicates information about pedestrian timing in non-visual format such as audible tones, verbal messages, and/or vibrating surfaces.” PROWAC R306.2: “Each crosswalk with pedestrian signal indication shall have an accessible pedestrian signal which includes audible and vibrotactile indications of the WALK interval.”

  19. Accessible Ped Signals (APS) PROWAG (R306.2) Also found in MUTCD 4E.09

  20. Pushbutton Placement PROWAG (R306.2) This is not accessible!

  21. Pushbutton Placement PROWAG (R404) Pushbuttons must have a level landing

  22. Pushbutton Placement PROWAG (R404) Not behind clutter!

  23. Pushbutton Placement PROWAG (R404) Pushbutton placement: not behind grass

  24. Pushbutton Placement PROWAG (R306.2) 40 feet Where are we sending pedestrians?

  25. Pushbutton Placement PROWAG (R404)

  26. Countdown Ped Signals PROWAG R306 Pedestrian count-down signal tells pedestrians how much crossing time is left …

  27. Pedestrian Detour Route PROWAG (R205) PROWAC R205 “When an existing pedestrian access route is blocked by construction, alteration, maintenance, or other temporary conditions, an alternate pedestrian access route complying to the maximum extent feasible shall be provided.” FHWA ADA Toolkit Desk Reference: “A smooth, continuous, hard surface should be provided throughout the entire length of the temporary pedestrian facility. There should be no curbs or abrupt changes in grade or terrain that could cause tripping or be a barrier to wheelchair use. The geometry and alignment of the facility should meet the applicable requirements of the "Americans with Disabilities Act Accessibly Guidelines for Buildings and Facilities (ADAAG)" (see Section 1A.11).”

  28. Pedestrian Detour Route PROWAG (R302) “Where the alternate circulation path is exposed to adjacent construction, excavation drop-offs, traffic, or other hazards, it shall be protected with a pedestrian barricade or channelizing device…” A continuous bottom edge 6” max above the groundupper rail 36” minimum above ground

  29. Pedestrian Detour Route Pedestrian route should be easy to travel

  30. Safe and Accessible It is possible to meet ADA and still have an unsafe condition.

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