642.9 Sidewalk Ramp and Curb Ramp Design Criteria - Revision history

Legged1: /* 642.9.3 Detectable Warnings */ Updated placement in islands and medians to match standards.

2022-10-04T19:19:49Z

642.9.3 Detectable Warnings: Updated placement in islands and medians to match standards.

← Older revision		Revision as of 14:19, 4 October 2022
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	The truncated dome surface area is a minimum length of 2 ft. covering the entire width of the ramp or curb opening, excluding the flare sides. The width of the truncated domes may be shortened by 2-3 in. on each side if recommended by the manufacturer for durability. The truncated domes are aligned on a square grid in the predominate direction of pedestrian travel to permit wheelchair wheels to roll between the domes. They are to be placed at the bottom of a ramp perpendicular to the path of travel, and parallel to the grade break, or 6-8 in. from the front of the curb depending on the type and location of the curb ramp.		The truncated dome surface area is a minimum length of 2 ft. covering the entire width of the ramp or curb opening, excluding the flare sides. The width of the truncated domes may be shortened by 2-3 in. on each side if recommended by the manufacturer for durability. The truncated domes are aligned on a square grid in the predominate direction of pedestrian travel to permit wheelchair wheels to roll between the domes. They are to be placed at the bottom of a ramp perpendicular to the path of travel, and parallel to the grade break, or 6-8 in. from the front of the curb depending on the type and location of the curb ramp.

	On large curb radii, one edge of the truncated dome surface area may be placed at the back of the curb to minimize the distance of the other edge from the curb. If either corner of the ~~detectabe~~ warning is more than 5 ft. from the back of the curb the detectable warnings should be placed in a radial pattern 6-8 in. from the face of the curb.		On large curb radii, one edge of the truncated dome surface area may be placed at the back of the curb to minimize the distance of the other edge from the curb. If either corner of the detectable warning is more than 5 ft. from the back of the curb the detectable warnings should be placed in a radial pattern 6-8 in. from the face of the curb.

	Detectable warnings are also provided at cut-throughs in islands and medians. Where islands or medians must be less than 4 feet in length, the detectable warnings are to ~~extend across the full length of the cut through, island or median~~. At islands and medians the detectable warnings are to be placed at the ~~curbline~~.		Detectable warnings are also provided at cut-throughs in islands and medians. Where islands or medians must be less than 6 feet in length, the detectable warnings are to be omitted. At islands and medians the detectable warnings are to be placed at the curb face.

	Where truncated domes are placed at the bottom of a ramp, the path between the domes shall be parallel to the path of travel on the ramp. At a blended transition or on a landing, the direction of the path between the domes may vary.		Where truncated domes are placed at the bottom of a ramp, the path between the domes shall be parallel to the path of travel on the ramp. At a blended transition or on a landing, the direction of the path between the domes may vary.

Kleins1: /* 642.9.4 Side Streets and Driveway Crossings */

2021-04-28T16:26:07Z

642.9.4 Side Streets and Driveway Crossings

← Older revision		Revision as of 11:26, 28 April 2021
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	==642.9.4 Side Streets and Driveway Crossings==		==642.9.4 Side Streets and Driveway Crossings==
	A defined walkway is required across all driveways. The defined walkway will consist of a paved area 4 ft. wide, at minimum, with a cross slope of 1% (2.0% maximum) to meet ADA standards. It does not have to be marked, but will provide ~~and~~ accessible path between the adjoining sidewalks or ramps. The running slope will 5% or less, or at the same grade as the roadway. Where possible, keep the entrance and sidewalk at the same grade, eliminating the need for ramps. When designing these pathways across entrances, it will be necessary to adjust the approaches to the defined pathway to prevent bottoming out of vehicles transversing the defined pathway.		A defined walkway is required across all driveways. The defined walkway will consist of a paved area 4 ft. wide, at minimum, with a cross slope of 1% (2.0% maximum) to meet ADA standards. It does not have to be marked, but will provide an accessible path between the adjoining sidewalks or ramps. The running slope will 5% or less, or at the same grade as the roadway. Where possible, keep the entrance and sidewalk at the same grade, eliminating the need for ramps. When designing these pathways across entrances, it will be necessary to adjust the approaches to the defined pathway to prevent bottoming out of vehicles transversing the defined pathway.

	==642.9.5 Crosswalks==		==642.9.5 Crosswalks==

Smithk: /* 642.9.1 Slope and Rise of Sidewalk Ramps */ Per DE, correction: minimum curb height for sidewalk ramp edge protection is 4 inches, not 2 inches.

2021-03-19T20:13:38Z

642.9.1 Slope and Rise of Sidewalk Ramps: Per DE, correction: minimum curb height for sidewalk ramp edge protection is 4 inches, not 2 inches.

← Older revision		Revision as of 15:13, 19 March 2021
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	A vertical rise greater than 6 in. will require a handrail. Handrails must be compliant with ADA standards, Section 4.8.5 (http://www.ada.gov/reg3a.html#Anchor-19425)		A vertical rise greater than 6 in. will require a handrail. Handrails must be compliant with ADA standards, Section 4.8.5 (http://www.ada.gov/reg3a.html#Anchor-19425)

	Edge protection will be provided on ramps and landings with drop-offs and shall have curbs, walls, railings, or projecting surfaces that prevent people from slipping off the ramp. Curbs shall have a minimum height of ~~2 in~~.		Edge protection will be provided on ramps and landings with drop-offs and shall have curbs, walls, railings, or projecting surfaces that prevent people from slipping off the ramp. Curbs shall have a minimum height of 4 inches.

	==642.9.2 Curb Ramps==		==642.9.2 Curb Ramps==

Smithk: Per DE, please closely read the article since most of the article has been re-written. EPG 642.1 through EPG 642.5 have been slightly revised and renumbered as EPG 642.8 through EPG 642.12.

2020-03-20T15:25:55Z

Per DE, please closely read the article since most of the article has been re-written. EPG 642.1 through EPG 642.5 have been slightly revised and renumbered as EPG 642.8 through EPG 642.12.

← Older revision		Revision as of 10:25, 20 March 2020
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Smithk at 15:23, 20 March 2020

2020-03-20T15:23:19Z

Show changes

Smithk: Smithk moved page 642.2 Sidewalk Ramp and Curb Ramp Design Criteria to 642.9 Sidewalk Ramp and Curb Ramp Design Criteria

2020-03-20T15:22:40Z

Smithk moved page 642.2 Sidewalk Ramp and Curb Ramp Design Criteria to 642.9 Sidewalk Ramp and Curb Ramp Design Criteria

← Older revision	Revision as of 10:22, 20 March 2020
(No difference)

Smithk at 17:05, 3 April 2019

2019-04-03T17:05:55Z

← Older revision		Revision as of 12:05, 3 April 2019
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	\|[http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608]		\|[http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608]
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	\|[https://www.modot.org/media/~~16862~~ Standard Plan 608.40]		\|[https://www.modot.org/media/16877 Standard Plan 608.40]
	\|-		\|-
	\|[https://www.modot.org/media/16879 Standard Plan 608.50]		\|[https://www.modot.org/media/16879 Standard Plan 608.50]

Smithk: updated link to Std. Plan 608.50

2019-04-03T17:04:07Z

updated link to Std. Plan 608.50

Smithk: updated links

2018-10-10T15:29:11Z

updated links

← Older revision		Revision as of 10:29, 10 October 2018
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	\|[http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608]		\|[http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608]
	\|-		\|-
	\|[~~http~~://www.modot.org/~~business~~/~~standards_and_specs/Online%20Standard%20Plans/60840.pdf~~ Standard Plan 608.40]		\|[https://www.modot.org/media/16862 Standard Plan 608.40]
	\|-		\|-
	\|[~~http~~://www.modot.org/~~business~~/~~standards_and_specs/Online%20Standard%20Plans/60850.pdf~~ Standard Plan 608.50]		\|[https://www.modot.org/media/16864 Standard Plan 608.50]
	\|-		\|-
	\|[~~http~~://www.modot.~~mo.gov/business/standards_and_specs~~/~~documents~~/~~62000.pdf~~ Standard Plan 620.00]		\|[https://www.modot.org/media/16896 Standard Plan 620.00]
	\|}		\|}
	==642.2.1 Slope and Rise of Sidewalk Ramps==		==642.2.1 Slope and Rise of Sidewalk Ramps==
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	* Pay items - The designer will estimate the square yardage for curb ramp and include it with the estimate for sidewalks and the quantity will be shown on the 2B sheet(s). A separate pay item is included for detectable warnings since they are not required on all ramps, and in many cases, are required to be retrofitted on existing curb ramps.		* Pay items - The designer will estimate the square yardage for curb ramp and include it with the estimate for sidewalks and the quantity will be shown on the 2B sheet(s). A separate pay item is included for detectable warnings since they are not required on all ramps, and in many cases, are required to be retrofitted on existing curb ramps.

	* See the [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608], [~~http~~://www.modot.org/~~business~~/~~standards_and_specs/Online%20Standard%20Plans/60850.pdf~~ Standard Plan 608.50] and [[642.1 Sidewalk Design Criteria#642.1.4 Running Slope, or Grade\|EPG 642.1.4]] for additional information.		* See the [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608], [https://www.modot.org/media/16864 Standard Plan 608.50] and [[642.1 Sidewalk Design Criteria#642.1.4 Running Slope, or Grade\|EPG 642.1.4]] for additional information.

	===642.2.2.1 Curb Ramp Alignment===		===642.2.2.1 Curb Ramp Alignment===
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	Curb ramps at intersections need to be designed on an individual basis. The location and type of the ramps are to be shown on the plans to ensure all details of the ramps have been taken into consideration and are constructable to MoDOT standards. Determining pedestrian pathways early in the design process is essential. The best ramp configuration for a given location may impact the location of utilities, traffic signals, light poles, storm drainage and other roadside features. It is recommended that the sidewalk and ramps be laid out early in the preliminary plans and in coordination with other roadside features.		Curb ramps at intersections need to be designed on an individual basis. The location and type of the ramps are to be shown on the plans to ensure all details of the ramps have been taken into consideration and are constructable to MoDOT standards. Determining pedestrian pathways early in the design process is essential. The best ramp configuration for a given location may impact the location of utilities, traffic signals, light poles, storm drainage and other roadside features. It is recommended that the sidewalk and ramps be laid out early in the preliminary plans and in coordination with other roadside features.

	There are a variety of curb ramp types. The pattern to be used depends on the location, type of street and existing design constraints. Curb ramps are normally categorized by their position relative to the curb line. The three most common configurations are perpendicular, parallel and diagonal. See [[642.3 Curb Ramp Applications\|EPG 642.3 Curb Ramp Applications]] and [~~http~~://www.modot.org/~~business~~/~~standards_and_specs/Online%20Standard%20Plans/60850.pdf~~ Standard Plan 608.50] for more details.		There are a variety of curb ramp types. The pattern to be used depends on the location, type of street and existing design constraints. Curb ramps are normally categorized by their position relative to the curb line. The three most common configurations are perpendicular, parallel and diagonal. See [[642.3 Curb Ramp Applications\|EPG 642.3 Curb Ramp Applications]] and [https://www.modot.org/media/16864 Standard Plan 608.50] for more details.

	==642.2.3 Detectable Warnings==		==642.2.3 Detectable Warnings==
	ADAAG defines a detectable warning as “a standardized surface feature built in or applied to walking surfaces or other elements to warn visually impaired people of hazards on a circulation path.” Detectable warnings are provided on curb ramps at side streets and signalized driveways, such as at a mall or major outlet/discount store. Truncated domes are never to be installed on ramps for residential driveways.		ADAAG defines a detectable warning as “a standardized surface feature built in or applied to walking surfaces or other elements to warn visually impaired people of hazards on a circulation path.” Detectable warnings are provided on curb ramps at side streets and signalized driveways, such as at a mall or major outlet/discount store. Truncated domes are never to be installed on ramps for residential driveways.

	Detectable warnings on walking surfaces are required to be truncated domes with a diameter of 0.9 in., a height of 0.2 in., and a center to center spacing of 1.65 in. to 2.35 in. in each direction. The truncated dome panel is to contrast visually with adjoining surfaces, either light-on-dark or dark-on-light. (Refer to [~~http~~://www.modot.org/~~business~~/~~standards_and_specs/documents/60850.pdf~~ Standard Plan 608.50]). The preferred color contrast is red for concrete and yellow for asphalt surfaces.		Detectable warnings on walking surfaces are required to be truncated domes with a diameter of 0.9 in., a height of 0.2 in., and a center to center spacing of 1.65 in. to 2.35 in. in each direction. The truncated dome panel is to contrast visually with adjoining surfaces, either light-on-dark or dark-on-light. (Refer to [https://www.modot.org/media/16864 Standard Plan 608.50]). The preferred color contrast is red for concrete and yellow for asphalt surfaces.

	The truncated dome surface area is a minimum length of 2 ft. covering the entire width of the ramp or curb opening, excluding the flare sides. The width of the truncated domes may be shortened by 2-3 in. on each side if recommended by the manufacturer for durability. The truncated domes are aligned on a square grid in the predominate direction of pedestrian travel to permit wheelchair wheels to roll between the domes. They are to be placed at the bottom of a ramp perpendicular to the path of travel, and parallel to the grade break, or 6-8 in. from the front of the curb depending on the type and location of the curb ramp.		The truncated dome surface area is a minimum length of 2 ft. covering the entire width of the ramp or curb opening, excluding the flare sides. The width of the truncated domes may be shortened by 2-3 in. on each side if recommended by the manufacturer for durability. The truncated domes are aligned on a square grid in the predominate direction of pedestrian travel to permit wheelchair wheels to roll between the domes. They are to be placed at the bottom of a ramp perpendicular to the path of travel, and parallel to the grade break, or 6-8 in. from the front of the curb depending on the type and location of the curb ramp.
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	==642.2.5 Crosswalks==		==642.2.5 Crosswalks==

	Crosswalks are a critical part of the pedestrian network. A crosswalk is defined as “the portion of a roadway designated for pedestrians to use in crossing the street” and may be either marked or unmarked. However, marked crosswalks are the most effective and are recommended where there are traffic signals. Marked crosswalks provide warning to motorists and assist pedestrians, especially pedestrians with low vision, in maneuvering across the street. Marked crossings are delineated in materials or markings that provide a visual contrast with the surface of the street and meet, at minimum, the dimensions shown on [~~http~~://www.modot.~~mo.gov/business/standards_and_specs~~/~~documents~~/~~62000.pdf~~ Standard Plan 620.00].		Crosswalks are a critical part of the pedestrian network. A crosswalk is defined as “the portion of a roadway designated for pedestrians to use in crossing the street” and may be either marked or unmarked. However, marked crosswalks are the most effective and are recommended where there are traffic signals. Marked crosswalks provide warning to motorists and assist pedestrians, especially pedestrians with low vision, in maneuvering across the street. Marked crossings are delineated in materials or markings that provide a visual contrast with the surface of the street and meet, at minimum, the dimensions shown on [https://www.modot.org/media/16896 Standard Plan 620.00].

	Crosswalk placement requires balancing several goals that sometimes compete.		Crosswalk placement requires balancing several goals that sometimes compete.

Smithk: updated links

2016-06-09T15:38:44Z

updated links

← Older revision		Revision as of 10:38, 9 June 2016
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	\|[http://www.ada.gov/reg3a.html#Anchor-19425 ADA Standards Section 4.8.5]		\|[http://www.ada.gov/reg3a.html#Anchor-19425 ADA Standards Section 4.8.5]
	\|-		\|-
	\|[http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0608~~.pdf Sec 608]		\|[http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608]
	\|-		\|-
	\|[http://www.modot.org/business/standards_and_specs/Online%20Standard%20Plans/60840.pdf Standard Plan 608.40]		\|[http://www.modot.org/business/standards_and_specs/Online%20Standard%20Plans/60840.pdf Standard Plan 608.40]
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	* Pay items - The designer will estimate the square yardage for curb ramp and include it with the estimate for sidewalks and the quantity will be shown on the 2B sheet(s). A separate pay item is included for detectable warnings since they are not required on all ramps, and in many cases, are required to be retrofitted on existing curb ramps.		* Pay items - The designer will estimate the square yardage for curb ramp and include it with the estimate for sidewalks and the quantity will be shown on the 2B sheet(s). A separate pay item is included for detectable warnings since they are not required on all ramps, and in many cases, are required to be retrofitted on existing curb ramps.

	* See the [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0608~~.pdf Sec 608], [http://www.modot.org/business/standards_and_specs/Online%20Standard%20Plans/60850.pdf Standard Plan 608.50] and [[642.1 Sidewalk Design Criteria#642.1.4 Running Slope, or Grade\|EPG 642.1.4]] for additional information.		* See the [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608], [http://www.modot.org/business/standards_and_specs/Online%20Standard%20Plans/60850.pdf Standard Plan 608.50] and [[642.1 Sidewalk Design Criteria#642.1.4 Running Slope, or Grade\|EPG 642.1.4]] for additional information.

	===642.2.2.1 Curb Ramp Alignment===		===642.2.2.1 Curb Ramp Alignment===

← Older revision		Revision as of 12:04, 3 April 2019
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	\|[https://www.modot.org/media/16862 Standard Plan 608.40]		\|[https://www.modot.org/media/16862 Standard Plan 608.40]
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	\|[https://www.modot.org/media/~~16864~~ Standard Plan 608.50]		\|[https://www.modot.org/media/16879 Standard Plan 608.50]
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	\|[https://www.modot.org/media/16896 Standard Plan 620.00]		\|[https://www.modot.org/media/16896 Standard Plan 620.00]
Line 64:		Line 64:
	* Pay items - The designer will estimate the square yardage for curb ramp and include it with the estimate for sidewalks and the quantity will be shown on the 2B sheet(s). A separate pay item is included for detectable warnings since they are not required on all ramps, and in many cases, are required to be retrofitted on existing curb ramps.		* Pay items - The designer will estimate the square yardage for curb ramp and include it with the estimate for sidewalks and the quantity will be shown on the 2B sheet(s). A separate pay item is included for detectable warnings since they are not required on all ramps, and in many cases, are required to be retrofitted on existing curb ramps.

	* See the [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608], [https://www.modot.org/media/~~16864~~ Standard Plan 608.50] and [[642.1 Sidewalk Design Criteria#642.1.4 Running Slope, or Grade\|EPG 642.1.4]] for additional information.		* See the [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=9 Sec 608], [https://www.modot.org/media/16879 Standard Plan 608.50] and [[642.1 Sidewalk Design Criteria#642.1.4 Running Slope, or Grade\|EPG 642.1.4]] for additional information.

	===642.2.2.1 Curb Ramp Alignment===		===642.2.2.1 Curb Ramp Alignment===
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	Curb ramps at intersections need to be designed on an individual basis. The location and type of the ramps are to be shown on the plans to ensure all details of the ramps have been taken into consideration and are constructable to MoDOT standards. Determining pedestrian pathways early in the design process is essential. The best ramp configuration for a given location may impact the location of utilities, traffic signals, light poles, storm drainage and other roadside features. It is recommended that the sidewalk and ramps be laid out early in the preliminary plans and in coordination with other roadside features.		Curb ramps at intersections need to be designed on an individual basis. The location and type of the ramps are to be shown on the plans to ensure all details of the ramps have been taken into consideration and are constructable to MoDOT standards. Determining pedestrian pathways early in the design process is essential. The best ramp configuration for a given location may impact the location of utilities, traffic signals, light poles, storm drainage and other roadside features. It is recommended that the sidewalk and ramps be laid out early in the preliminary plans and in coordination with other roadside features.

	There are a variety of curb ramp types. The pattern to be used depends on the location, type of street and existing design constraints. Curb ramps are normally categorized by their position relative to the curb line. The three most common configurations are perpendicular, parallel and diagonal. See [[642.3 Curb Ramp Applications\|EPG 642.3 Curb Ramp Applications]] and [https://www.modot.org/media/~~16864~~ Standard Plan 608.50] for more details.		There are a variety of curb ramp types. The pattern to be used depends on the location, type of street and existing design constraints. Curb ramps are normally categorized by their position relative to the curb line. The three most common configurations are perpendicular, parallel and diagonal. See [[642.3 Curb Ramp Applications\|EPG 642.3 Curb Ramp Applications]] and [https://www.modot.org/media/16879 Standard Plan 608.50] for more details.

	==642.2.3 Detectable Warnings==		==642.2.3 Detectable Warnings==
	ADAAG defines a detectable warning as “a standardized surface feature built in or applied to walking surfaces or other elements to warn visually impaired people of hazards on a circulation path.” Detectable warnings are provided on curb ramps at side streets and signalized driveways, such as at a mall or major outlet/discount store. Truncated domes are never to be installed on ramps for residential driveways.		ADAAG defines a detectable warning as “a standardized surface feature built in or applied to walking surfaces or other elements to warn visually impaired people of hazards on a circulation path.” Detectable warnings are provided on curb ramps at side streets and signalized driveways, such as at a mall or major outlet/discount store. Truncated domes are never to be installed on ramps for residential driveways.

	Detectable warnings on walking surfaces are required to be truncated domes with a diameter of 0.9 in., a height of 0.2 in., and a center to center spacing of 1.65 in. to 2.35 in. in each direction. The truncated dome panel is to contrast visually with adjoining surfaces, either light-on-dark or dark-on-light. (Refer to [https://www.modot.org/media/~~16864~~ Standard Plan 608.50]). The preferred color contrast is red for concrete and yellow for asphalt surfaces.		Detectable warnings on walking surfaces are required to be truncated domes with a diameter of 0.9 in., a height of 0.2 in., and a center to center spacing of 1.65 in. to 2.35 in. in each direction. The truncated dome panel is to contrast visually with adjoining surfaces, either light-on-dark or dark-on-light. (Refer to [https://www.modot.org/media/16879 Standard Plan 608.50]). The preferred color contrast is red for concrete and yellow for asphalt surfaces.

	The truncated dome surface area is a minimum length of 2 ft. covering the entire width of the ramp or curb opening, excluding the flare sides. The width of the truncated domes may be shortened by 2-3 in. on each side if recommended by the manufacturer for durability. The truncated domes are aligned on a square grid in the predominate direction of pedestrian travel to permit wheelchair wheels to roll between the domes. They are to be placed at the bottom of a ramp perpendicular to the path of travel, and parallel to the grade break, or 6-8 in. from the front of the curb depending on the type and location of the curb ramp.		The truncated dome surface area is a minimum length of 2 ft. covering the entire width of the ramp or curb opening, excluding the flare sides. The width of the truncated domes may be shortened by 2-3 in. on each side if recommended by the manufacturer for durability. The truncated domes are aligned on a square grid in the predominate direction of pedestrian travel to permit wheelchair wheels to roll between the domes. They are to be placed at the bottom of a ramp perpendicular to the path of travel, and parallel to the grade break, or 6-8 in. from the front of the curb depending on the type and location of the curb ramp.