Presentation on theme: "Detectable Warnings X Correct Placement if X < 5 feet"— Presentation transcript:
1Detectable Warnings X Correct Placement if X < 5 feet PROWAG(R )XExplanation of 5’ rule in PROWAG.GRADE BREAKCorrect Placement if X < 5 feetCorrect Placement if X > 5 feet
2Detectable WarningsPROWAG(Advisory R )If radial detectable warning pattern at left cannot be constructed, the detectable warning plates can be constructed like the red blocks (they’re not aligned well on the slide – but you get the idea – keep triangle gaps between plates to a minimum)“… the vertical rows of truncated domes in a detectable warning surface should be aligned to perpendicular or radial to the grade break…”
3Detectable Warnings Avoid gaps in detectable warnings PROWAG (R304) ADAAG(4.29)Gaps in detectable warnings like the yellow image are not preferred but acceptable. Anything larger needs treatment like the gray detectable warnings.Avoid gaps indetectable warnings
4Detectable WarningsPROWAG(R304)ADAAG(4.29)Contrast is an important part of detectable warnings (light on dark or dark on light).“Detectable warning surfaces shall contrast visually with adjacent… walkway surfaces, either light-on-dark or dark-on-light.”
5Detectable Warnings Detectable warnings are not wayfinding devices. PROWAG(R304)ADAAG(4.29)If there’s no curb, there must be a detectable warning.Detectable warnings are not wayfinding devices.This application has a gap.
6Detectable Warnings Does this meet ADA? PROWAG (R304) ADAAG (4.29) This is why we have standard plans!Does this meet ADA?
7Detectable WarningsPROWAG(R221)ADAAG(4.29)This is what happens when ADA is misunderstood.“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.”
8MDOT Special Provision 03SP803(A) Detectable WarningsNo more stamped detectable warnings due to MDOT special provision.MDOT Special Provision 03SP803(A)“Do not construct detectable warnings by forming or stamping in newly cast concrete.”
9Changes in Level PROWAG (R301.5.2) ADAAG (4.5.2) Explains changes in level requirements.
10Changes in Level PROWAG (R301.5.2) ADAAG (4.5.2) Changes is level can come from faulted sidewalk or as seen here, even during new construction.
11Gaps and GratesPROWAG(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 .”
12Bridge Joints “Openings shall not permit passage of a sphere PROWAG(R )ADAAG(4.5.4)Sidewalk can be overlooked during expansion joint installation.“Openings shall not permit passage of a spheremore than ½” in diameter.”
13A properly installed bridge expansion device covers the gap Bridge JointsPROWAG(R )ADAAG(4.5.4)This is an expansion joint cover for bridges.A properly installed bridge expansion device covers the gap
15Bus Pads PROWAG (R410) ADAAG (10.2.1) Bus pads should be connected to sidewalk, when in place.***ADAAG states that, “where new bus stop pads are constructed at bus stops… they shall have a firm, stable surface; a minimum clear length of 96 inches… and a minimum clear width of 60 inches…”
16Buses often need additional room for loading Bus PadsPROWAG(R410)ADAAG(10.2.1)Chairlift takes room and timeBuses often need additional room for loading
17Parking On-Street Parking PROWAG(R216, R308)On-Street ParkingADAAG 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…
18Accessible Ped Signals (APS) PROWAG(R306.2)WHAT ARE ACCESSIBLE PEDESTRIAN SIGNALS?All pedestrian signals need to be accessible, but that doesn’t make them “accessible pedestrian signals” (APS).Explain the difference and the importance of the change in PROWAG.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.”
19Accessible Ped Signals (APS) PROWAG(R306.2)Explain how audible requirements in MUTCD and PROWAG affect pushbutton placement 10’ apart so that each of the pushbuttons can be distinguished. This figure is from the MUTCD.Also found in MUTCD 4E.09
20Pushbutton Placement This is not accessible! PROWAG (R306.2) Must be accessible!
21Pushbuttons must have a level landing Pushbutton PlacementPROWAG(R404)This pushbutton is located on a sidewalk ramp. There is no level landing for the pushbutton.Pushbuttons must have a level landing
22Pushbutton Placement Not behind clutter! PROWAG (R404) This is out of the traffic signal designer’s control; it’s a matter of enforcing local ordinances regarding the placement of newspaper boxes, which can't be banned from the public right-of-way (1st amendment right to a free press).Not behind clutter!
23Pushbutton placement: not behind grass PROWAG(R404)This push button is on the wrong side of the pole, this pedestrian must reach around the pole, which is difficult to do from a wheelchair.Pushbutton placement: not behind grass
24Where are we sending pedestrians? Pushbutton PlacementPROWAG(R306.2)40 feetThe pushbutton is below the ped head in this photo, which is about 40’ away from marked ped crossing.Where are we sending pedestrians?
25Pushbutton Placement PROWAG (R404) Level surface dimensions for pushbutton actuation.
26Countdown Ped SignalsPROWAGR306Animated. This pedestrian crosses at this light every day, and knows exactly when he can start crossing, with how much time left to make it to the curb.Pedestrian count-down signal tells pedestrians how much crossing time is left …
27FHWA ADA Toolkit Desk Reference: Pedestrian Detour RoutePROWAG(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).”Pedestrian detour routes must be ramped (but don’t necessary need to meet all of ADA).The circled ramps must not be curbed. Also correct any changes in level through the pedestrian detour route to ensure that the path is accessible.
28Pedestrian 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…”ADA requires pedestrian protection for closed sidewalks and ramps.A continuous bottom edge 6” max above the ground upper rail 36” minimum above ground
29Pedestrian route should be easy to travel Pedestrian Detour RoutePedestrian route should be easy to travel
30It is possible to meet ADA and still have an unsafe condition. Safe and AccessiblePed safety must be considered when sidewalk and sidewalk ramps are altered.It is possible to meet ADA and still have an unsafe condition.