Curb cut

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A pram ramp with tactile paving that connects an off-street walking trail to a road Pram Ramp.jpg
A pram ramp with tactile paving that connects an off-street walking trail to a road

A curb cut (U.S.), curb ramp, depressed curb,dropped kerb (UK), pram ramp, or kerb ramp (Australia) is a solid (usually concrete) ramp graded down from the top surface of a sidewalk to the surface of an adjoining street. It is designed primarily for pedestrian usage and commonly found in urban areas where pedestrian activity is expected. In comparison with a conventional curb (finished at a right angle 4–6 inches (10–15 cm) above the street surface) a curb cut is finished at an intermediate gradient that connects both surfaces, sometimes with tactile paving.

Contents

History

Historically speaking, footpaths were finished at right angles to the street surface with conventional curb treatments. Their introduction to help people pushing prams dates back at least as far as the 1930s in the UK. [1]

Kalamazoo, Michigan installed curb cuts in the 1940s as a pilot project introduced by veteran and lawyer Jack H. Fischer to aid employment of veterans with disabilities. [2] [3] A major project in Berkeley, California led by the grassroots Center for Independent Living led to curb cuts up and down Telegraph and Shattuck Avenues creating an extensive path of travel. [4] Following this, the value of curb cuts was promoted more strongly and their installment was often made on a voluntary basis by municipal authorities and developers.

Curb cuts in Western countries have been mandated by legislation such as the Americans with Disabilities Act of 1990 (ADA) in the United States (which requires that curb cuts be present on all sidewalks) or the Disability Discrimination Act 1992 in Australia. The legislative requirements in some jurisdictions have been increased from the original requirements in recent times, to the point where existing treatments can now fail to meet the most recent design requirements. [5]

When a larger group of people use curb cuts than just the disabled for whom the curb cut requirement was legislated, this new convenience can be seen as a positive externality. [6]

Users and uses

A curb cut at an intersection Curb cut for wheelchair ramp (DSC 3616).jpg
A curb cut at an intersection

Curb cuts placed at street intersections allow wheelchair users, baby carriages, toddlers on tricycles etc., to move onto or off of a sidewalk with less difficulty. Many curb cuts also feature tactile paving, a pattern of circular bumps that indicate to visually impaired pedestrians that they are about to enter a roadway. [7]

Curb cuts also benefit pedestrians if they are using a walker or cane or wheelchair, pushing a stroller, a pram or a buggy for babies, pushing or pulling a cart or hand truck, or walking next to a bicycle; as well as anyone riding a bicycle, roller skates, or a skateboard.

Other applications

A wider curb cut is also useful for motor vehicles to enter a driveway or parking lot on the other side of a sidewalk. In the UK this is commonly referred to as a 'crossover'.

Smaller curb cuts may be used along streets, parking areas or sidewalks in the manner of a water bar; by redirecting water from traditional drainage ways to stormwater BMPs which allow infiltration, such as a grassed area or rain garden.

Design

Accessible curb cuts transition from the low side of a curb to the high side (usually 15 cm or 5.9 in change in level). Accessible curb ramps are a minimum of 1 metre (3.28 ft) wide. They are sloped no greater than 1:12 (8.33%), which means that for every 12 cm (4.7 in) of horizontal distance, they rise no more than one centimetre (38 in). The concrete curb ramp is sometimes scored with grooves, the texture of which may serve as a warning to vision-impaired persons of the transition to the street. Such grooves also allow for traction and water runoff, and may be stained a color that significantly contrasts with the adjacent concrete. If a curb ramp contains flared sides, they are usually no greater than 1:10 (10%) slope.[ citation needed ]

Pram ramps in Australia are designed according to Australian Standard AS 1428: Design for access and mobility.

Universal design

Proponents of universal design often point to the curb cut as a prime example when raising awareness of the benefits of this design philosophy.

See also

Related Research Articles

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A sidewalk, pavement, footpath in Australia, India, New Zealand and Ireland, or footway is a path along the side of a road. Usually constructed of concrete, pavers, brick, stone, or asphalt, it is designed for pedestrians. A sidewalk is normally higher than the roadway, and separated from it by a kerb. There may also be a planted strip between the sidewalk and the roadway and between the roadway and the adjacent land.

<span class="mw-page-title-main">Pedestrian crossing</span> Place designated for pedestrians to cross a road, street or avenue

A pedestrian crossing is a place designated for pedestrians to cross a road, street or avenue. The term "pedestrian crossing" is also used in the Vienna and Geneva Conventions, both of which pertain to road signs and road traffic.

Pavement or paving may refer to:

<span class="mw-page-title-main">Traffic calming</span> Road design measures that raise the safety of pedestrians and motorists

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<span class="mw-page-title-main">Street</span> Public thoroughfare in a built environment

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<span class="mw-page-title-main">Accessibility</span> Modes of usability for people with disabilities

Accessibility is the design of products, devices, services, vehicles, or environments so as to be usable by people with disabilities. The concept of accessible design and practice of accessible development ensures both "direct access" and "indirect access" meaning compatibility with a person's assistive technology.

<span class="mw-page-title-main">Curb extension</span> Traffic calming measure

A curb extension is a traffic calming measure which widens the sidewalk for a short distance. This reduces the crossing distance and allows pedestrians and drivers to see each other when parked vehicles would otherwise block visibility. The practice of banning car parking near intersections is referred to as daylighting the intersection.

<span class="mw-page-title-main">Low-floor bus</span> Bus with no steps between the ground and the interior

A low-floor bus is a bus or trolleybus that has no steps between the ground and the floor of the bus at one or more entrances, and low floor for part or all of the passenger cabin. A bus with a partial low floor may also be referred to as a low-entry bus or seldom a flat-floor bus in some locations.

<span class="mw-page-title-main">Roncesvalles Avenue</span> Street in Toronto, Ontario, Canada

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<span class="mw-page-title-main">Wheelchair ramp</span> Incline allowing wheelchair users to move between areas of different height

A wheelchair ramp is an inclined plane installed in addition to or instead of stairs. Ramps permit wheelchair users, as well as people pushing strollers, carts, or other wheeled objects, to more easily access a building, or navigate between areas of different height. Ramps for accessibility may predate the wheelchair and are found in ancient Greece.

<span class="mw-page-title-main">Mobility scooter</span> Mobility aid

A mobility scooter is an electric personal transporter used as mobility aid for people with physical impairment, mostly auxiliary to a powered wheelchair but configured like a motorscooter. When motorized they function as micromobility devices and are commonly referred to as a powered vehicle/scooter, or electric scooter. Non-motorized mobility scooters are less common, but are intended for the estimated 60% of wheelchair users who have at least some use of their legs. Whilst leg issues are commonly assumed to be the reason for using scooters, the vehicles are used by those with a wide range of conditions from spinal injuries to neurological disorders.

<span class="mw-page-title-main">Curb</span> Edge where a sidewalk meets a road

A curb, or kerb, is the edge where a raised sidewalk or road median/central reservation meets a street or other roadway.

<span class="mw-page-title-main">Kassel kerb</span> Type of kerb used at bus stops

A Kassel kerb is a design of kerb that features a concave-section that allows for an easier alignment for buses. The kerb was first introduced in the German city of Kassel for the low-floor tram system but has since been adopted for use at traffic stops. Kassel kerbs can be part of a bus stop kerb, designed for low-floor buses that serve an elevated bus stop platform.

<span class="mw-page-title-main">Tactile paving</span> Textured ground surface indicators to assist blind people

Tactile paving is a system of textured ground surface indicators found at roadsides, by and on stairs, and on railway station platforms, to assist pedestrians who are vision impaired.

Accessibility for people with disabilities on the Toronto Transit Commission (TTC) system is incomplete but improving. Most of the Toronto subway system was built before wheelchair access was a requirement under the Ontarians with Disabilities Act (ODA). However, all subway stations built since 1996 are equipped with elevators, and elevators have been installed in 44 stations built before 1996. Over 75 percent of Toronto's subway stations are accessible. The original plan was to make all stations accessible by 2025; however, a few stations might not be accessible until 2026.

<span class="mw-page-title-main">Wheelchair</span> Chair with wheels used by people with mobility deficiencies

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<span class="mw-page-title-main">Shared-use path</span> Pathway for pedestrians and cyclists

A shared-use path, mixed-use path or multi-use pathway is a path which is "designed to accommodate the movement of pedestrians and cyclists". Examples of shared-use paths include sidewalks designated as shared-use, bridleways and rail trails. A shared-use path typically has a surface that is asphalt, concrete or firmly packed crushed aggregate. Shared-use paths differ from cycle tracks and cycle paths in that shared-use paths are designed to include pedestrians even if the primary anticipated users are cyclists.

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<span class="mw-page-title-main">Curb cut effect</span> Effect of assistive technology

The curb cut effect is the phenomenon of disability-friendly features being used and appreciated by a larger group than the people they were designed for. For example, many hearing people use closed captioning. The phenomenon is named for curb cuts – miniature ramps comprising parts of sidewalk – which were first made for wheelchair access in particular places, but are now ubiquitous and no longer widely recognized as a disability-accessibility feature.

<span class="mw-page-title-main">Pedestrian crossings in the United Kingdom</span>

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References

  1. Institution Of Municipal Engineers, London (1935-07-30). "Proceedings, Institution of Municipal Engineers, London, Volume 62, Issue 3" . Retrieved May 31, 2018.
  2. Brown, Stephen. "The curb ramps of Kalamazoo". Independent Living Institute. Retrieved July 18, 2011.
  3. Duvall, Jonathan; Sivakanthan, Sivashankar; Daveler, Brandon; Sundaram, S. Andrea; Cooper, Rory A. (2022-12-28). "Inventors with Disabilities — An Opportunity for Innovation, Inclusion, and Economic Development". Technology & Innovation. 22 (3): 322. doi:10.21300/22.3.2022.5. ISSN   1949-8241. S2CID   256882735.
  4. Williamson, Bess (26 June 2012). "The People's Sidewalks". Boom: A Journal of California. Retrieved 22 September 2014.
  5. "Paths: Infrastructure and Asset Management Plan" (PDF). City of Tea Tree Gully Council. August 2009. p. 17. Archived from the original (PDF) on 20 February 2011. Retrieved 12 November 2010.
  6. Grabar, Henry (19 July 2018). "American Cities Are Squandering Some of Their Most Valuable Real Estate: The Curb". Slate. Archived from the original on 19 July 2018. ...mandated by the 1990 Americans with Disabilities Act, soon provided a path for all kinds of street users, like kids on bicycles, parents with strollers, and senior citizens with shopping carts. Pedestrians are drawn to using curb cuts, and a street corner would look odd without them. It's a story of how changes made for small groups wind up having positive, unforeseen externalities.
  7. McParland, Tom (9 February 2017). "Here's What Those Bumps in the Sidewalk Are For". Jalopnik. Gawker Media . Retrieved 9 February 2017.