ADA CHECKLIST

Issue 8/19/2024
Effective 8/20/2024

Project No. ______________ City ____________________ Location __________________________________________________

PEDESTRIAN SIDEWALKS
Figures/Definitions Requirements 1 YES NO NA
Sidewalk Width • Sidewalks within St. Louis County right of way shall be 5 feet wide minimum for
arterial (ARS), collector (CRS-2), and non-residential (CRS) roads. Clear width may
Width Measurements: All width be reduced to 4 feet, exclusive of a curb, only when necessary to avoid obstacles
dimensions shall be exclusive of which cannot be practicably relocated. 2
the width of adjacent curb. • Sidewalks shall have a continuous and unobstructed clear width of 4 feet wide
minimum along residential (CRS) subdivision streets.
Pedestrian Access Route: An • Where 4’ sidewalks are provided, 5 foot x 5 foot passing spaces shall be provided at
accessible, continuous, and intervals of 200 feet maximum. Driveway approaches may be used to meet the
unobstructed path of travel for use passing space requirement.
by pedestrians with disabilities a • St. Louis County Sidewalks located within 2 feet of the back of curb are to be
pedestrian circulation path. constructed 6 feet wide minimum and constructed adjacent to the back of the curb
for all development types. 2
Pedestrian Circulation Path: A • Detectable warning surfaces shall be provided, where a pedestrian access route
prepared exterior or interior surface connects to or crosses a street, signalized commercial entrance, commercial
provided for pedestrian travel in the driveway with stop or yield control, pedestrian rail crossings, or pedestrian refuge
public right-of-way. island.
• Where sidewalk stubs are constructed with no pedestrian outlet, a turning space
shall be constructed at the sidewalk terminus with a minimum width as defined by the
road classification2 and a minimum length of 4 feet. The turning space shall have a
maximum running slope and cross slope of 2.1 percent. The Road Grade Allowable
Deviation is not applicable to this pedestrian access route feature. 2
Running Slope: The slope that is • The running slope of a pedestrian access route shall be 5 percent maximum where
parallel to the direction of travel. not contained within a roadway right-of-way and where the pedestrian access route
exceeds the general grade of the adjacent roadway.
• Where sidewalks are contained within a street or highway right-of-way, the grade of
the sidewalk is permitted to equal the general grade established for the adjacent
street or highway. This does not apply within a cross walk.
Cross Slope: The slope that is • The maximum cross slope of the walkway of a pedestrian access route shall be 2.1
perpendicular to the direction of percent. Allowable cross slope alternatives can be found in sections
accessible pedestrian travel. “CROSSWALKS” and “CURB RAMPS”.
 PEDESTRIAN SIDEWALKS
Figures/Definitions Requirements 1 YES NO NA
Vertical Alignment • Vertical alignment shall be planar within curb ramp runs, blended transitions,
landings, and gutter areas within the pedestrian access route, and within clear
spaces required for accessible pedestrian signals, street furniture, and operable
parts.
• Surface slopes that meet at grade breaks shall be flush.
• Where the pedestrian access route crosses rail tracks at grade, the surface of the
pedestrian access route shall be level and flush with the top of the rail at the outer
edges of the rail. The surface between the rails shall be aligned with the top of the
rail.
Changes in Level • Changes in level of ¼ inch high maximum shall be permitted to be vertical.
• Changes in level between ¼ inch high maximum and ½ inch high maximum shall be
beveled with a slope of 1v:2h or flatter. The bevel shall be applied across the entire
level change.
• No change in level is permitted where Curb Ramps, Blended Transitions, Landings or
Sidewalks meet gutter and roadway grade; this transition must be flush.
Protruding Objects • Protruding objects on sidewalks and other pedestrian circulation paths shall not
reduce the clear width to less than 4 feet minimum.
• Objects with leading edges more than 27 inches and not more than 80 inches above
the finish floor or ground shall protrude 4 inches maximum horizontally into the
circulation path.
• The dimensions of the base for post mounted objects which protrude into the
pedestrian access route shall be 2.5 inches thick minimum and the width shall
extend to within 4 inches horizontally from the protruding edge of the object.
• Where a sign or other obstruction is mounted between posts or pylons and the clear
distance between the posts or pylons is greater than 12 inches, the lowest edge of
such sign or obstruction shall be 27 inches maximum or 80 inches minimum above
the finish floor or ground.
• Vertical clearance shall be 80 inches high minimum. Pedestrian barriers shall be
provided where the vertical clearance is less than 80 inches high. The leading edge
of such guardrail or barrier shall be located 27 inches maximum above the finish floor
or ground.
Openings • Openings in floor and ground surfaces, including utility covers, shall not allow
Tip: Plugging of holes greater than passage of a sphere more than ½ inch diameter. Elongated openings shall be
½ inch with a material approved by placed so that the long dimension is perpendicular to the dominant direction of travel.
the engineer is acceptable as long
as it complies with the changes in
level requirements. 2

2
 CROSSWALKS
Figures/Definitions Requirements 1 YES NO NA
Intersection crosswalks are not • All intersections with a minimum of 3 legs, both signalized and non-signalized, shall
required to be marked at non- be constructed with accessible crosswalks. Exceptions will be made on a case by
signalized intersections. case basis for documented safety concerns.
• The running grade of the pedestrian access route within a street crossing shall be 5
Crosswalk marking needs will be percent maximum, measured parallel to the direction of pedestrian travel in the
determined by the St. Louis County crosswalk.
Division of Operations. • Crosswalk cross slope requirements:
◼ The maximum cross slope at intersections with stop or yield control shall be 2.1
percent.
◼ The cross slope at intersections without stop or yield control where vehicles can
proceed through the intersection without slowing or stopping shall be 5 percent
maximum.
◼ The maximum cross slope for yielding right turn movements at signalized
intersections shall be 5 percent. 2
◼ The cross slope at midblock crossings shall be permitted to meet street or
highway grade.
• Crosswalk pavement marking is 12 inches wide white.
• Stop bar is at least 4 feet from the crosswalk.
• Curb ramps at marked crossings shall be wholly contained within the markings,
excluding any flared sides.
• Gratings, access covers, and other appurtenances should not be located on curb
ramps, landings, blended transitions, and gutters within the pedestrian access route.
• Grade breaks shall not be permitted on the surface of curb ramps, blended
transitions, landings, or gutter areas within the pedestrian access route. Surface
slopes that meet at grade breaks shall be flush.
• Roundabouts:
◼ When sidewalks are flush against the curb, a continuous detectable edge
treatment (NOT a detectable warning surface) shall be provided where crossings
are not intended. The bottom edge of the continuous detectable edge shall be no
more than 15 in above the sidewalk.
◼ Where multilane crossings exist, pedestrian actuated signals are required.
• Pedestrian activated signals shall be provided at pedestrian crossings at multi-lane
channelized turn lanes at signalized intersections.

3
 CURB RAMPS
Figures/Definitions Requirements 1 YES NO NA
• CURB RAMPS A curb ramp, blended transition, or a combination of curb ramps and
CURB RAMP: A sloped connection blended transitions shall connect the pedestrian access routes at each pedestrian
that is cut through or built up to a street crossing.
curb. • Curb Ramps shall follow all criteria in the “CURB RAMPS” section in addition to the
ramp type specific criteria in curb ramp subsections 1 – 6, as applicable.
• New construction and redevelopment projects shall incorporate a design that provides
15 Foot Allowable Alternative: individual ramps for each crossing direction.
For a compliant Curb Ramp to • The clear width of Curb Ramps, excluding flares, shall be 5.0 feet wide minimum for
exceed 8.33 percent running grade, arterial (ARS) and collector (CRS-2) roads.2 Curb Ramp width may be reduced to 4
its constructed length must exceed feet wide along residential (CRS) subdivision streets.
15.0 feet. • Curb Ramp runs shall have a running slope less than 8.33 percent but shall not
require the ramp length to exceed 15.0 feet.
◼ 15 Foot Allowable Alternative: The running slope for a curb ramp is not limited to
8.33 percent maximum if the constructed curb ramp length exceeds 15 feet in
length.
• Permeable pavement shall not be permitted for construction of Curb Ramps, blended
transitions, or landings. 2
• Curb Ramp and Blended Transition cross slope requirements:
◼ The maximum cross slope at intersections with stop or yield control shall be 2.1
percent.
◼ The cross slope at intersections without stop or yield control where vehicles can
proceed through the intersection without slowing or stopping shall be 5 percent
maximum.
◼ The maximum cross slope for yielding right turn movements at signalized
intersections shall be 5 percent. 2
◼ The cross slope at midblock crossings shall be permitted to meet street or
highway grade.
◼ Clear spaces shall be permitted to overlap other Turning and Clear spaces.
• Handrails and Edge protection shall not be required on curb ramps, their landings, or
their clear spaces.
• Street and ramp slope break is 13.3 percent or less. (See adjacent figure.)
• No change in level is permitted where Curb Ramps, Blended Transitions, Turning
Spaces or Sidewalks meet gutter and roadway grade; this transition must be flush.
• Flared sides with a slope of 10 percent maximum, measured parallel to the curb line,
shall be provided where a pedestrian circulation path crosses the side of the curb
ramp.

4
 CURB RAMPS
Figures/Definitions Requirements 1 YES NO NA
• Detectable warning surfaces shall be provided, where a pedestrian access route
connects to or crosses a street, signalized commercial entrance, commercial
driveway permitted to operate like a public street, pedestrian rail crossings, or
pedestrian refuge island.
• Gratings, access covers, and other appurtenances should not be located on Curb
Ramps, blended transitions, turning spaces, clear spaces, or gutters within the
pedestrian access route.
◼ However, for alteration type projects, gratings, access covers, and other
appurtenances may be located within Curb Ramps, blended transitions, clear
spaces and gutters when relocation of said features is technically infeasible.
• Grade breaks shall not be permitted on the surface of curb ramps, blended
transitions, landings, or gutter areas within the pedestrian access route. Surface
slopes that meet at grade breaks shall be flush.
• Grade Breaks at the top and bottom of curb ramp runs shall be perpendicular to the
direction of the ramp run.

CURB RAMP SUBSECTION 1: PARALLEL CURB RAMPS (PROWAG R304.3)

Parallel Curb Ramp • Parallel Curb Ramps have a running slope that is parallel to the curb or street is
serves.
• Parallel curb ramps must follow all criteria in the “CURB RAMPS” section in addition
to the criteria of subsection 1.
• A Landing shall be required at the bottom of all parallel curb ramps and shall be
permitted to overlap other landings.
◼ Landings shall be 4.0 feet minimum by 4.0 feet minimum.
◼ The cross slope of the landing shall be 2.1 percent maximum measured
perpendicular to the direction of travel on the curb ramp run.
◼ The slope of the landing, measured parallel to the direction of travel on the curb
ramp run, shall be permitted to be equal to or less than the cross slope of the
crosswalk as defined in “CROSSWALKS” above.

5
 CURB RAMP SUBSECTION 2: PERPENDICULAR CURB RAMPS (PROWAG R304.2)
Figures/Definitions Requirements 1 YES NO NA
• Perpendicular Curb Ramps have a running slope that is perpendicular to the curb
or the street is serves.
• Perpendicular curb ramps must follow all criteria in the “CURB RAMPS” section in
addition to the criteria of subsection 2.
• A Landing shall be required at the top of all perpendicular curb ramps where a turning
movement is required and shall be permitted to overlap other landings.
◼ Landings shall be 4.0 feet minimum by 4.0 feet minimum.
◼ When a landing serves only one curb ramp, the landing slope measured
perpendicular to the curb ramp run shall be equal to or less than the cross slope of
Flared Sides in Pathway –Turning Space the curb ramp run, and the landing slope measured parallel to the curb ramp run shall
Constrained By Building – X=5’ Min be 2.1 percent maximum.
◼ Where a landing serves two curb ramps, the landing slope in either direction of
travel shall not exceed the cross slope of the crosswalk parallel to the direction of
travel.
• Flared sides with a slope of 10 percent maximum, measured parallel to the curb line,
shall be provided where a pedestrian circulation path crosses the side of the curb
ramp.
• Where the pedestrian circulation path does not cross the Curb Ramp (grass next to
ramp), then vertical curb returns may be constructed adjacent to the Curb Ramp.
Return Curbs Not in Pathway
• Where both ends of the bottom grade break are 5.0 feet or less from the back of curb,
the detectable warning shall be located on the ramp surface at the bottom grade
break. Where either end of the bottom grade break is more than 5.0 feet from the
back of curb, the detectable warning shall be located on the lower landing.
• A clear area 4.0 feet by 4.0 feet shall be provided beyond the bottom grade break and
within the crosswalk. The clear area shall be located wholly outside the vehicle travel
lanes that run parallel to the crosswalk. The running slope of the clear area shall be
5.0 percent maximum.
CURB RAMP SUBSECTION 3: BLENDED TRANSITIONS (PROWAG R304.4)
• Blended Transitions must follow all criteria in the “CURB RAMPS” section in addition
to the criteria of subsection 3.
• Blended Transitions shall have a running slope of 5 percent maximum.
• The cross slope shall be equal to or less than the cross slope specified in
“CROSSWALKS”
• Detectable warning shall be placed at the back of curb.
• Where a blended transition serving more than one direction has a running slope
greater than 2.1 percent, a pedestrian access route shall be provided so that a
pedestrian not crossing the street may bypass the blended transition.

6
 CURB RAMP SUBSECTION 4: DIAGONAL CURB RAMPS
• A Diagonal Curb Ramp is a single parallel or perpendicular Curb Ramp which
serves two crossings. Diagonal Curb Ramps shall not be permitted for new
construction or redevelopment projects. Diagonal Curb Ramps may only be used for
alteration type projects where construction of split Curb Ramps is technically
infeasible.
• Diagonal Curb Ramps must follow all criteria in the “CURB RAMPS” section and
applicable subsections.
• Diagonal Curb Ramps shall provide a minimum 4 foot by 4 foot landing beyond the
curb line and wholly outside of both parallel vehicle travel lanes. At marked crossings,
the turning space shall be contained within the crosswalk markings.

CURB RAMP SUBSECTION 5: ENTRANCES

Figures/Definitions Requirements 1 YES NO NA
• The minimum continuous and unobstructed clear width of a pedestrian access route
provided across commercial and residential entrances shall be 4 feet.
• Cross slope shall be 2.1 percent maximum.

7
 CURB RAMP SUBSECTION 6: ISLANDS AND MEDIANS
Figures/Definitions Requirements 1 YES NO NA
• Medians and pedestrian refuge islands in crosswalks shall contain a pedestrian
access route, including passing spaces and connecting to each crosswalk.
• Raised islands in crossings shall be cut through level with the street or have Curb
Ramps at both sides.
• Curb Ramps used for ramped islands shall meet all criteria of section “CURB
RAMPS” in addition to the criteria of subsection 6.
• All median and island passage spaces shall provide a clear width of 5 feet minimum.
• Medians and pedestrian refuge islands shall be 6.0 feet minimum in length in the
direction of pedestrian travel. 2
• Island Curb Ramp and cut through cross slope requirements:
Cut Through Island ◼ The cross slope at intersections with stop or yield control shall be 2.1 percent
maximum.
◼ The cross slope at intersections without stop or yield control where vehicles can
proceed through the intersection without slowing or stopping shall be 5 percent
maximum.
◼ The cross slope at midblock crossings shall be permitted to meet street or
highway grade.
• The running grade of the pedestrian access route within an island or median shall be
5 percent maximum, exclusive of Curb Ramps, measured parallel to the direction of
pedestrian travel.
• Ramped islands shall have a turning space 5 feet long minimum by 5 feet wide
Ramped Island
minimum at the top of each ramp. Cross slope and running slope of the turning space
is permitted to equal the grade of the adjacent roadway up to maximum of 5 percent.
• The raised portions of cut through islands and medians shall be a minimum of 4 feet
on a side. 2

8
 DETECTABLE WARNING DEVICES (TRUNCATED DOMES)
Figures/Definitions Requirements 1 YES NO NA
A standardized surface feature built in • Detectable warnings shall consist of a surface of truncated domes aligned in a square
or applied to pedestrian circulation or radial grid pattern complying with PROWAG R305. All detectable warning products
paths and other pedestrian facilities to shall require approval by St. Louis County prior to installation.2
warn of hazards.
• Detectable warning surfaces shall contrast visually with adjacent gutter, street or
highway, or walkway surfaces, either light-on-dark or dark-on-light.
• Detectable warning surfaces shall extend 24 inches in the direction of travel and the
full width of the curb ramp (exclusive of flares), the landing, or the blended transition.
However, when detectable warnings are required by a manufacturer’s installation
specifications to be embedded into concrete with a surrounding edge, domes may be
installed at less than the required full width. However, the detectable warning surface
shall never be more than 2 inches from the edge of the curb ramp, the landing, or the
blended transition.
• Detectable warning surfaces shall be installed where a pedestrian access route
connects to a public street, signalized commercial entrance, or commercial driveways
with stop or yield control.
• Pedestrian route crossings of residential driveways shall not be provided with
detectable warnings.
• Perpendicular Curb Ramps: Where both ends of the bottom grade break are 5 feet or
less from the back of curb, the detectable warning shall be located on the ramp
surface at the bottom grade break. Where either end of the bottom grade break is
more than 5 feet from the back of curb, the detectable warning shall be located on the
clear area so that both front corners of the detectable warning surfaces are at the
back of curb.
• Parallel Curb Ramps: Detectable warning surfaces shall be placed on the landing at
the flush transition between the street and sidewalk.
• Landings and Blended Transitions: The detectable warning shall be located on the
landing or blended transition at the back of curb.
• At pedestrian at-grade rail crossings not located within a street or highway, detectable
warning surfaces shall be placed on each side of the rail crossing. The edge of the
detectable warning surface nearest the rail crossing shall be 6.0 feet minimum and
15.0 feet maximum from the centerline of the nearest rail. Where pedestrian gates are
provided, detectable warning surfaces shall be placed on the side of the gates
opposite the rail.
• Detectable warnings at cut-through islands shall be located no greater than 6 inches
from the edges of the island or at the back of curb and shall be separated by a 2.0
foot minimum length of walkway without detectable warnings. Where the island has
no curb, the detectable warning shall be located at the edge of roadway.

9
 SIDEWALK RAMPS
Figures/Definitions Requirements 1 YES NO NA
Sidewalk Ramps • A SIDEWALK RAMP is a sidewalk segment with a running grade in excess of 5
percent but less than 8.33 percent which is not a curb ramp (a curb ramp only exists
For example, a ramp segment with where transitioning from sidewalk grade to road grade) nor exempted by the
the maximum allowed running Roadway Grade Allowable Deviation.
slope of 8.33% would require 5’ x 5’ • The clear width of Sidewalk Ramps, excluding flares, shall be 5.0 feet wide minimum
landing after every 30’ of run. along arterial (ARS) and collector (CRS-2) roads. Sidewalk Ramp width may be
reduced to 4 feet wide along residential (CRS) subdivision streets. 2
• Cross slope of Sidewalk Ramp runs shall be 2.1 percent maximum.
• The rise for any ramp run shall be 30 inches maximum.
• Sidewalk Ramps shall have level landings at the top and the bottom of each ramp run.
Level landings shall be at least as wide as the widest ramp leading to the landing, be
a minimum of 5 feet in length and have a 2.1 percent maximum slope in any direction.
• Edge protection shall be provided on each side of Sidewalk Ramp runs and Sidewalk
Ramp landings.
• Sidewalk Ramp runs outside public right of way with a rise greater than 6 inches are
required to have handrails.
• When handrail is provided, it shall be provided on both sides of stairs and Sidewalk
Ramps.
• Gratings, access covers, and other appurtenances shall not be located on ramps,
landings, blended transitions, or gutters within the pedestrian access route.
• Grade breaks shall not be permitted on the surface of ramps, blended transitions,
landings, or gutter areas within the pedestrian access route.
• Surface slopes that meet at grade breaks shall be flush.

10
 Accessible Pedestrian Signals and Pedestrian Pushbuttons
Figures/Definitions Requirements YES NO NA
An accessible pedestrian signal and • Pedestrian signals shall include accessible pedestrian signals and pedestrian
pedestrian pushbutton is an integrated pushbuttons complying with R307 of PROWAG and Sections 4I.01 through 4K.05 of
device that communicates information the MUTCD 2023.
about the WALK and DON’T WALK
• Pushbuttons shall be pressure activated piezo type with momentary LED and audible
intervals at signalized intersections in
non-visual formats (i.e., audible tones alert.
and vibrotactile surfaces) to • Pushbuttons shall require no more than 5 lbs to activate.
pedestrians who are blind or have low • Pushbuttons shall be located to meet the following criteria:
vision. ◼ Adjacent to a clear space (see below)
◼ An accessible route from the pushbutton to the ramp.
◼ Between the edge of the crosswalk line (extended) farthest from the center of the
intersection and the side of a curb ramp (if present) but not more than 5 feet from
said crosswalk line. (Subject to physical constraints)
◼ Between 1.5 and 10 ft. from the edge of the curb, shoulder, or pavement. (Subject
to physical constraints)
◼ With face of the pushbutton parallel to the crosswalk to be used.
◼ Mounting height between 38 and 44 inches.2
Where two pedestrian pushbuttons are provided on the same intersection corner or within
the same island, the pushbuttons shall be separated by a distance of at least 10 feet.
◼ Allowable deviation for alteration type projects only: If physical constraints make
this impractical, the pushbuttons may be placed closer together or on the same
pole.
• Signs shall be mounted adjacent to or integral with pedestrian push buttons.
• APS Requirements (in addition to those above) :
◼ Tactile arrows with high visual contrast clearly indicating which crosswalk signal is
actuated by the pushbutton shall be located on each pushbutton, aligned parallel
to the direction of travel
◼ Pushbutton locator tones which adjust intensity in accordance with ambient noise
shall be provided.
◼ If two accessible pushbuttons are at least 10 feet apart, the audible walk indication
shall be a percussive tone, repeating eight to ten ticks per second.
◼ If two accessible pushbuttons are less than 10 feet part or on the same pole, each
accessible pushbutton shall have the following features:
▪ Pushbutton locator tone
▪ Tactile arrow
▪ Speech walk message for the WALKING PERSON indication
▪ Speech pushbutton information message
◼ If the pedestrian clearance time is set to only allow a pedestrian to cross to the
median, an additional pedestrian detector shall be provided in the median.

11
 Accessible Pedestrian Signals and Pedestrian Pushbuttons
Figures/Definitions Requirements YES NO NA
◼ APS shall have both audible and vibrotactile walk indications. The accessible walk
indication shall have the same duration as the pedestrian walk signal except when
the pedestrian signal rests in walk. Audible walk indications shall be during the walk
interval only and be audible from the beginning of the associated crosswalk. The
tactile arrow on the pushbutton shall vibrate during the walk interval.
• Clear spaces:
◼ Compliant with Surface and Vertical Discontinuity section above with a maximum
cross slope of 2.0%.
▪ However, within Islands and medians, the cross slope of the clear space
adjacent to the push button may match the cross slope requirements in the
“ISLANDS AND MEDIANS” section.
◼ At least 2.5 ft by 4.0 ft.
Non-compliant push button installation ▪ Space below the pushbutton may be included as clear space if knee and toe
restricts access for disabled clearance is provided (see below).
pedestrians. ◼ Positioned for either forward or parallel approach.
◼ At least one full unobstructed side of a clear space shall adjoin a pedestrian
access route or adjoin another clear space as an approach.
◼ Where confined on all or part of three sides, additional maneuvering space shall
be provided:
▪ Forward approach: Clear space and additional maneuvering space shall be at
least 3.0 ft wide where the depth exceeds 2.0 ft.
▪ Parallel approach: Clear space and additional maneuvering space shall be at
least 5.0 ft wide where the depth exceeds 1.25 ft.
• Toe Clearance: From the finish surface to 9 in above the finish surface.
◼ Shall extend between 17 and 25 inches (inclusive) under the element.
◼ The width shall be at least 2.5 ft.
• Knee Clearance: From 9 to 30 in above the above the finish surface.
◼ Shall extend between 11 and 25 inches (inclusive) under the element and may be
reduced by 1 in of depth for each 6 inches in height.
◼ The width shall be at least 2.5 ft.
• Reach Range:
◼ Forward Approach: Pushbutton must be even with the edge of the clear space (no
offset is permitted).
◼ Parallel Approach: Side reach of no more than 10 inches is permitted.
• Clear spaces, turning spaces, and landings at APS, pushbuttons, and other accessible
elements may have a running slope or cross slope consistent with the grade of the
adjacent pedestrian access route or roadway, but no greater than 5%.
• All pedestrian signal phase timing shall be calculated using a pedestrian walk speed of
3.5 ft/s maximum. The crosswalk distance used in calculating pedestrian signal phase
timing shall include the entire length of the crosswalk.

12
 BUS BOARDING AND ALIGHTING AREAS
Figures/Definitions Requirements 1 YES NO NA
• Bus stop boarding and alighting areas shall have a firm, stable surface.
• Bus stop boarding and alighting areas shall provide a clear length of 8 feet
minimum, measured perpendicular to the curb or vehicle roadway edge
• Bus stop boarding and alighting areas shall provide a clear width of 5 feet minimum
measured parallel to the vehicle roadway.
• Bus stop shelters, boarding and alighting areas shall be connected to streets,
sidewalks, or pedestrian paths by an accessible route.
• Parallel to the roadway, the slope of the bus stop boarding and alighting area shall
be the same as the roadway, to the maximum extent feasible.
• Perpendicular to the roadway, the slope of the bus stop boarding and alighting area
shall be 2.1 percent maximum.
• Bus shelters shall provide a minimum 30 inch by 48 inch clear floor or ground space
entirely within the shelter.

EDGE PROTECTION
Figures/Definitions Requirements 1 YES NO NA
• Edge protection shall be provided on each side of Sidewalk Ramp runs and at each
side of the adjacent Sidewalk Ramp landings.
• Edge protection shall not be required on Curb Ramps or their associated landings,
turning spaces, or clear spaces.
• Edge protection shall not be required on the sides of Sidewalk Ramp landings
having a vertical drop-off on ½ inch maximum within 10 inches horizontally of the
minimum landing area. 2
• The floor or ground surface of the Sidewalk Ramp run or landing shall extend 12
inches minimum beyond the inside face of a handrail.
• A curb or barrier shall be provided that prevents the passage of a 4 inch diameter
sphere, where any portion of the sphere is within 4 inches of the finish floor or
ground surface.

13
 STAIRWAYS
Figures/Definitions Requirements 1 YES NO NA
• All steps on a flight of stairs shall have uniform riser heights and uniform tread
depths. Risers shall be 4 inches high minimum and 7 inches high maximum. Treads
shall be 11 inches deep minimum.
• Open risers are not permitted.
• The radius of curvature at the leading edge of the tread shall be 1/2 inch maximum.
Nosings that project beyond risers shall have the underside of the leading edge
curved or beveled. Risers shall be permitted to slope under the tread at an angle of
30 degrees maximum from vertical. The permitted projection of the nosing shall
extend 1 1/2 inches maximum over the tread below.
• Stairs shall have handrails complying with PROWAG R409.

14
 PEDESTRIAN RAILROAD CROSSINGS
Figures/Definitions Requirements 1 YES NO NA
• Ramps at railroad crossings shall all follow all criteria in the “CURB RAMPS” section
in addition to the ramp type specific criteria in “CURB RAMP” subsections 1 – 6, as
applicable except where superseded by the requirements in this section.
• Width of railroad approach panels shall be 5 feet wide minimum for new sidewalk
construction where the pedestrian route is greater than 2 feet from the prolongation
of the back of curb through the rail crossing. Clear width may be reduced to 4 feet
only when necessary to avoid obstacles which cannot be practicably relocated and
on alteration projects. 2
• Width of railroad approach panels shall be 6 feet wide minimum for new sidewalk
construction where the pedestrian route is less than 2 feet from the prolongation of
the back of curb through the rail crossing. Clear width may be reduced to 4 feet only
when necessary to avoid obstacles which cannot be practicably relocated and on
alteration projects. 2
• Flangeway gaps at pedestrian at-grade rail crossings shall be 2.5 in maximum on
non-freight rail track and 3 in maximum on freight rail track.
Truncated Dome Placement • At pedestrian at-grade rail crossings not located within a street or highway,
No Pedestrian Gates detectable warning surfaces shall be placed on each side of the rail crossing. The
edge of the detectable warning surface nearest the rail crossing shall be 6.0 feet
minimum and 15.0 feet maximum from the centerline of the nearest rail. Where
pedestrian gates are provided, detectable warning surfaces shall be placed on the
side of the gates opposite the rail.

• A landing shall be provided beyond the bottom grade break of all railroad crossing
Ramps between the Ramp and the rail approach panel. 2
o The landing shall be a minimum of 4 feet by 4 feet. 2
o The landing shall reside wholly outside of the rail approach panel. 2
o The running grade of the landing shall match the adjacent road grade. 2

Ramp Layout Where Pedestrian Route Width Matches Pedestrian Rail

Crossing Width

Truncated Dome Placement

With Pedestrian Gates

15
 PEDESTRIAN RAILROAD CROSSINGS
Figures/Definitions Requirements 1 YES NO NA
• A transition segment shall be constructed between the rail approach panel and
pedestrian route where the pedestrian route width is greater than the width of the
pedestrian rail approach panels. 2
o The transition segment shall be a minimum of 4 feet in the direction of
pedestrian travel. 2
o The transition segment shall reside wholly outside of the rail approach
panel.2
o The running grade of the transition segment shall match the adjacent road
grade. 2

Ramp Layout Where Pedestrian Route Width Narrows at Pedestrian Rail

Crossing

HANDRAIL AND PEDESTRIAN GUARDRAIL

Figures/Definitions Requirements 1 YES NO NA
• The minimum clear width of walking surfaces within public right of way shall be 4
feet minimum.
• Handrails are required on Sidewalk Ramp runs with a rise greater than 6 inches
and on certain stairways. Handrails are not required on walking surfaces with
running slopes less than 1:20. Where required, handrails shall be provided on both
sides of stairs and Sidewalk Ramps.
• Handrails shall be continuous within the full length of each stair flight or ramp run.
Inside handrails on switchback or dogleg stairs and ramps shall be continuous
between flights or runs.
• Top of gripping surfaces of handrails shall be 34 inches minimum and 38 inches
maximum vertically above walking surfaces, stair nosings, and ramp surfaces.
Handrails shall be at a consistent height above walking surfaces, stair nosings, and
ramp surfaces.
• Clearance between handrail gripping surfaces and adjacent surfaces shall be 1 1/2
inches minimum.
16
 HANDRAIL AND PEDESTRIAN GUARDRAIL
Figures/Definitions Requirements 1 YES NO NA
• Handrail gripping surfaces with a circular cross section shall have an outside
diameter of 1 1/4 inches minimum and 2 inches maximum.
• Handrail gripping surfaces with a non-circular cross section shall have a perimeter
dimension of 4 inches minimum and 6 1/4 inches maximum, and a cross-section
dimension of 2 1/4 inches maximum.
• Handrail gripping surfaces and any surfaces adjacent to them shall be free of sharp
or abrasive elements and shall have rounded edges.
• Handrails shall not rotate within their fittings.
• Ramp handrails shall extend horizontally above the landing for 12 inches minimum
beyond the top and bottom of ramp runs. Extensions shall return to a wall, guard,
or the landing surface, or shall be continuous to the handrail of an adjacent ramp
run.
• At the top of a stair flight, handrails shall extend horizontally above the landing for
12 inches minimum beginning directly above the first riser nosing. Extensions shall
return to a wall, guard, or the landing surface, or shall be continuous to the handrail
of an adjacent stair flight.
• At the bottom of a stair flight, handrails shall extend at the slope of the stair flight
for a horizontal distance at least equal to one tread depth beyond the last riser
nosing. Extension shall return to a wall, guard, or the landing surface, or shall be
continuous to the handrail of an adjacent stair flight.
• The surface of the ramp run or landing shall extend 12 inches minimum beyond the
inside face of a handrail.

Unless otherwise noted, all notes on this form are direct ADA requirements as published in the PROWAG dated August 8,
2023.

17
Reduction in Access Prohibited. An alteration shall not decrease or have the effect of decreasing the accessibility of a facility or an
accessible connection to an adjacent building or site below the requirements for new construction in effect at the time of the alteration.
All slope and grade measurements for ADA compliance will be made using a calibrated 2 foot long digital level.
1 Any “NO” answer means that location is ADA non-compliant and needs to be corrected before final acceptance of the work, except as
follows. Although exceptions listed in the above requirements may not meet St Louis County current policy standards, work that is
authorized by the engineer and does meet the minimum ADA standards will be accepted as ADA compliant. Where it is technically
infeasible to correct deficiencies as part of the current work, those locations will be labeled as non-compliant and marked “NO”. These
items will be added to the St. Louis County Transition Plan Inventory for correction at a later date.
2 A St. Louis County requirement.

All exceptions and technically infeasible locations should be discussed with civil plan review or the design division prior to acceptance
of the work. All technically infeasible locations will need to be thoroughly documented by the engineer, and that documentation will be
attached to this form and retained as part of the final acceptance records.

18
 Inspector Name: _________________________________________________________

Inspector Signature: _________________________________________________________ Date:

Resident Engineer or Area Engineer Name: ________________________________________

Resident Engineer or Area Engineer Signature: _____________________________________ Date:

Distribution:
❑ Project Office
❑ St. Louis County Permit Office
❑ St. Louis County ADA Compliance Officer

SAMPLE
ADA EXCEPTIONS DOCUMENTATION
Project No. ______________ City ____________________ Location __________________________________________________

Item Location Standard As Built Discussion

Sidewalk Width Third Street Sta 3+00 to 7+00 RT 5’ wide 3’ wide Sidewalk constrained by existing building foundation.

Curb Ramp Grade SE Quad of Main & First 8.33% 11.2% Fiber vault could not be moved to accommodate ramp

19
Inspector Name: _________________________________________________________

Inspector Signature: _________________________________________________________ Date:

Resident Engineer or Area Engineer Name: ________________________________________

Resident Engineer or Area Engineer Signature: _____________________________________ Date:

Distribution:
❑ Project Office
❑ St. Louis County Permit Office
❑ St. Louis County ADA Compliance Officer

ADA EXCEPTIONS DOCUMENTATION

Project No. ______________ City ____________________ Location __________________________________________________

Item Location Standard As Built Discussion

20