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ACEC & IDOT REQUIRED DESIGN & DOCUMENTATION FOR ADA COMPLIANT SIDEWALK CURB RAMPS DISTRICT 1 TRAINING
ACEC & IDOT
REQUIRED DESIGN &
DOCUMENTATION FOR
ADA COMPLIANT SIDEWALK
CURB RAMPS
DISTRICT 1 TRAINING
Instructors:
Steve Schuessler, P.E.
SE3, LLC
Pedestrian Access Routes / Curb Ramps / Detectable Warnings
Jim McNally, P.E.
Baxter & Woodman
Pedestrian Street Crossings / MOT / Parking / Design Considerations
INTRODUCTION
Americans with Disabilities Act (ADA)
Signed into law on July 26, 1990
ADA requires that buildings and facilities be accessible and usable by people with disabilities
Access Board established ADA guidelines in 1991 & again in 2004
Public Rights-of-Way Accessibility Guidelines (PROWAG)
Published in Federal Register July 26, 2011
Supplemented February 13, 2013 to address shared use paths
On January 23, 2016, the FHWA issued a memorandum recognizing that PROWAG standards “are the currently recommended best practices and can be considered the state of practice that could be followed for areas not fully addressed by the present ADAAG standards.”
BACKGROUND
MAINTENANCE
-Do not need to address PROWAG
Chip Seals
Fog Seals
Scrub Sealing
Crack Fill ing and Sealing
Joint Crack Seals
Slurry Seals
Diamond Grinding
Joint Repairs
Pavement Patching
Surface Sealing
Dowel Bar Retrofit
Spot High-Friction Treatments
PROJECT SCOPE
ALTERATIONS
-Triggers use to address PROWAG
Addition of new layer of Asphalt
Mill & Fill / Mill & Overlay
Cape Seals
New Construction
Hot In-Place Recycling
Open-Graded Surface Course
Microsurfacing / Thin-Lift Overlay
Rehabilitation & Reconstruction
R302 PEDESTRIAN ACCESS ROUTES (PAR)
R302.2 PEDESTRIAN ACCESS ROUTE (PAR)
Pedestrian Access Route (PAR)
PAR connects pedestrian elements and facilities required to be accessible.
PAR shall consist of one or more of the following components▪ Sidewalks
▪ Curb Ramps
▪ Sidewalk Ramps
▪ Street/Rail Crossings
▪ Pedestrian Overpass / Underpass
▪ Elevators / Lifts
▪ Doors / Doorways / Gates
All components shall comply with applicable PROWAG provisions
Stairways and escalators shall not be part of a PAR.
R302.3 CONTINUOUS WIDTH
R302.3 CONTINUOUS WIDTH
R302.3.2 CONTINUOUS WIDTH
R302.3 CONTINUOUS WIDTHR302.3.1 MEDIANS AND PEDESTRIAN REFUGE ISLANDS
R302.4 PASSING SPACES
200’ 5’5’4’
R302.5 GRADE
The grade of the Pedestrian Access Route (PAR) shall not exceed the
general grade established for the adjacent street or highway. Where
PAR is not contained with a street or highway, the grade of PAR shall
be 5% max.
R302.6 CROSS SLOPE
2%2%
PAR
R302.6 CROSS SLOPE - DRIVEWAYS
R302.7 - SURFACES
Firm, Stable, Slip Resistant
Vertical surface discontinuities shall be 0.25 in max
Beveled vertical surface discontinuities shall be 0.5 in max with a
slope not steeper than 50%
MAX
¼” ½”MAX
VERTICAL BEVELED
R302.7.3 HORIZONTAL OPENINGS
Horizontal opening shall not be more than 0.5 in
Elongated opening shall be placed perpendicular to direction of travel
R302.7.3 HORIZONTAL OPENINGSFLANGEWAY GAPS AT PEDESTRIAN RAIL CROSSINGS
R304 CURB RAMPS AND BLENDED TRANSITIONS
R304.5.3 CROSS SLOPE
R304.5.3 CROSS SLOPE
R304.5.4 COUNTER SLOPE
CROSSWALK TRANSITION
Transition from Lower Landing to Crosswalk
A curb ramp at a cross slope of 2% is allowed to transition to a crosswalk at a cross
slope of 5% at a signalized intersection at the lowering landing area because you are
going from one compliance to the next and the level landing requirements are not
required in this case.
2%
5%
R304.5.2 GRADE BREAKS
R304.5.5 CLEAR SPACE
R305 CURB RAMPS
Types of Curb Ramps
Perpendicular (424001)
Parallel Corner (424011)
Parallel Mid-Block (424016)
Combined Curb Ramps
Blended Transitions / Depressed
Corners (424021)
Diagonal (424006)
R304 CURB RAMPS & BLENDED TRANSITIONS
R304.2.3 FLARED SIDES & SIDE CURB
R304.3.1 TURNING SPACE
R304.3.1 TURNING SPACE
R304.2.2 RUNNING SLOPE / GRADE BREAK
Differences between IDOT
Highway Standards and PROWAG
Lower Landing
IDOT: 1:50 Max.
PROWAG: 5% or Roadway Grade
Upper Landing
IDOT: Required
PROWAG: Not Required
Try to Follow Highway Standard
First, then meet PROWAG
No deviation required if PROWAG
requirements are met
R304.2.2 RUNNING SLOPE / GRADE BREAK
R304 CURB RAMPS & BLENDED TRANSITIONS
R304 CURB RAMPS & BLENDED TRANSITIONS
R304.4.1 RUNNING SLOPE
R304 CURB RAMPS & BLENDED TRANSITIONS
R305 DETECTABLE WARNING SURFACES
Dome Size
surfaces shall consist of truncated
domes aligned in a square or radial
grid pattern.
Truncated domes shall have a base
diameter of 0.9” min and 1.4” max,
top diameter of 50% to 65% of the
base diameter.
R305.1.1 DETECTABLE WARNING SURFACES
Dome Spacing
Truncated domes shall have a
center-to-center spacing of 1.6” and
2.4” maximum
Base-to-base spacing of 0.65” min
measured between the most
adjacent domes
0.2”
0.9” – 1.4”
1.6”-2.4”
1.6”-2.4”
0.65”
R305.1.3 DETECTABLE WARNING SURFACESCONTRAST
R305.2.4 DETECTABLE WARNING SURFACESPLACEMENT
2’ wide
Full width
At the Back of Curb or
Properly oriented to grade break
Add pay item Detectable Warnings (Special) and
the special provision Detectable Warnings (Special)
in City of Chicago for curb ramp improvements to
ensure cast iron detectable warnings are used.
≤ 5’ Setback > 5’ Setback
R305.2 DETECTABLE WARNING SURFACESPLACEMENT
R305.2 DETECTABLE WARNING SURFACESPLACEMENT
Incorrect P lacement– Not Ful l Width Incorrect p lacement – Not Ful l Width Incorrect P lacement – Not at BOC
R305.2.4 DETECTABLE WARNING SURFACESPLACEMENT
R305.2.4 DETECTABLE WARNING SURFACESDRIVEWAYS & ALLEYS
DETECTABLE WARNINGS AT DRIVEWAYS & ALLEYS
BDE 58-1.09 (c) 2. Location. “… Detectable warnings are also
required where sidewalks cross al leys and commercial entrances
where traff ic control devices (e.g., yield signs, stop signs or
signals) are present.”
Guidance has been given to use discretion when:
▪ Some driveways with a large amount of traff ic should have
detectable warnings regardless of traff ic control devices.
R306 PEDESTRIAN STREET CROSSINGS
R306 PEDESTRIAN STREET CROSSINGS
Refer to the MUTCD Section 3 for guidance on when or how to mark
crosswalks
Curb ramps and blended transitions must be wholly contained within
the pedestrian street crossing
Crosswalk markings should be located so that the curb ramps are
within the extension of the crosswalk markings
306 PEDESTRIAN STREET CROSSINGS
R306 PEDESTRIAN STREET CROSSING
R209 PEDESTRIAN PUSHBUTTONS
R3R209 PEDESTRIAN PUSHBUTTONS
R209 PEDESTRIAN PUSHBUTTONS
Front of push button shall not be further than
10” from the paved surface
If post foundation is too large or too far from
clear space an extension might be needed.
▪ Extensions – 6”, 12” or 18”
No new poles will be added on a resurfacing or
stand alone ADA contract.
R209 PEDESTRIAN PUSHBUTTONS
Example of poor placement Example of push
button extension
MAINTENANCE OF PEDESTRIAN
TRAFFIC DURING CONSTRUCTION
Temporary Sidewalks
Width
▪ Same as existing but minimum 4 ft.
▪ Wider should be considered w/high
ped volume
▪ If < 5 ft – Provide 5’x5’ passing space
every 200 ft.
Surface
▪ Firm, stable & slip resistant
IDOT WORK ZONE TRAFFIC CONTROL
Same-side alternate routes
▪ Extra crossing increase risk
Covers temporary facilities
▪ Street fairs, block parties, farmers
markets
Follow Sidewalk, Corner Or
Crosswalk Closure Standard (701801)
Channelizing Devices
Section 6F.63 MUTCD
Devices shall be detectable
▪ Continuous dectable bottom/top surfaces
▪ Bottom shall be no higher than 2 in
▪ Top shall be no lower than 32 in
IDOT WORK ZONE TRAFFIC CONTROL
IDOT WORK ZONE TRAFFIC CONTROL
Acceptable examples Not Acceptable!
ACCESSIBLE ON-STREET PARKING
TYPES OF ACCESSIBLE PARKING
On Street or Off Street
Marked vs. Unmarked
Metered or Unmetered
Standards
▪ Illinois Accessibility Code
▪ ADAAG
▪ PROWAG
▪ MUTCD
▪ BLRS/BDE Policy Manuals
TYPES OF ACCESSIBLE PARKING
Number of accessible
spaces is based on total
marked or metered spaces
on block perimeter
DESIGN CONSIDERATIONS
FIELD REVIEW
CLEAR WIDTH
UTILITIES
ENTRANCES REVIEW SURVEY
- During field review pay close
attention to every ramp
- Look for items not picked up in
survey such as landscaping
sprinklers
- Take pictures of utilities to identify
ownerPUSH BUTTON LOCATION
EXISTING ROW
It is important to know where
the existing ROW is located
CARRIAGE WALKS
Do they need to meet PROWAG?
Yes, if they lead to a crosswalk
No, if they do not lead to a crosswalk.
However, follow section R308 of
PROWAG if Transit Stop
RAISED SHOULDERS/PATHS
Do the shoulders need to meet PROWAG?
If the shoulders are intended as the pedestrian
accommodation, YES.
▪ A good indicator in the absence of local agency coordination is if
they have ramps at the corner street crossings.
▪ We strongly encourage coordination with the local agency to make a
determination if time allows.
If no ramp exist, they are not required to meet
PROWAG.
Cycle tracks would require meeting bike requirements
UTILITY CONFLICTS
Identify potential util ity conflicts early and
notify IDOT PM
Utilit ies within curb ramp should be relocated
whenever possible
Detectable warning portion should be free of
any util it ies
6” valve boxes are to be listed in the status of
util it ies special provision in order to be
adjusted by the municipality. Provide pay
i tem for 24” frame and lids to be adjusted.
This should not be listed in the SP.
If handholes are impacted use pay item
“REBUILD EXISTING HANDHOLE” since
handholes cannot be adjusted
Is Construction Tolerance allowed?
▪ No
IDOT is currently designing for:
▪ 1.5% Cross Slope
▪ 1:14 (7.14%) Ramp Slopes
CONSTRUCTION TOLERANCES
CONSTRUCTION LAYOUT SPECIAL FOR RESURFACING WITH
ADA AND STAND ALONE ADA (D-1)
Include this special provision for resurfacing projects with ADA ramps or
stand-alone ADA ramp projects.
▪ Use pay item X0320050 CONSTRUCTION LAYOUT (SPECIAL)
▪ Listed in D1 Special Provisions Checklist
For Reconstruction/Widening contracts include pay item Z0013798
CONSTRUCTION LAYOUT LSUM 1 instead.
EARTH EXCAVATION QUANTITY DETERMINATION
Estimated at 0.01 cubic yard per 1 square foot of sidewalk when the
ground is flat
Typically 150-200 SF of sidewalk removal and replacement will occur per
corner
HANDRAILS
AVOID! AVOID! AVOID!
▪ Roadway Hazard
▪ Maintenance Liability
Required on sidewalk ramps with rise > 6”
Both sides of Ramps (R409.2)
Continuity (R409.3)
▪ Continuous within full ramp run
34” ≤ Top of gripping surface ≤ 38” above
walking/ramp surface
Handrails shall extend 12” min beyond ramp runs
PHASE I ADA DETAILS
PHASE II ADA DETAILS
RECONSTRUCTION AND WIDENING
PHASE II ADA DETAILS
RECONSTRUCTION AND WIDENING
PHASE II ADA DETAILS
RESURFACING AND ADA STAND ALONE CONTRACTS
PHASE II ADA DETAILS
RESURFACING AND ADA STAND ALONE CONTRACTS
PHASE II ADA DETAILS
RESURFACING AND ADA STAND ALONE CONTRACTS
MEP FORM (BDE 3101) & APPROVAL PROCESS
MEP = Maximum Extent Practicable. Document waiver requests to FHWA/BDE in the planning/design phase.
MEP’s will not be approved for Phase I or Temporary Construction situations.
MEP’s typically submitted for running slope, cross slope, width (PAR), turning space and lowering landing
MEP not required for curb ramp transit ion area between a 2% cross sloped ramp to a 5% cross sloped crosswalk at a traffic signal.
MEP forms are reviewed by BDE at the same time as the Monthly FWHA meeting. To have your forms reviewed in a timely manner email the MEP forms to the District ADA coordinator 2 weeks in advance of the FHWA meeting. District 1 – [email protected]. In addition email should be sent to Bureau of Programming’s Geometrics Unit Head requesting BDE to review the MEPS. Submit up to 50 MEP’s at a time.
MEP FORM (BDE 3101) & APPROVAL PROCESS
On an ADA resurfacing contract, an
MEP form was submitted since the
PAR clearance width was less than
4’ wide at the traffic signal pole (2’)
and the street l ight (3.3’). Traffic
signal and lighting adjustments
were outside the scope of the
resurfacing contract.
MEP FORM (BDE 3101) & APPROVAL PROCESS
MEP FORM (BDE 3101) & APPROVAL PROCESS
MEP FORM (BDE 3101) & APPROVAL PROCESS
MEP FORM (BDE 3101) & APPROVAL PROCESS
