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  2. Wheelchair ramp - Wikipedia

    en.wikipedia.org/wiki/Wheelchair_ramp

    In the US, the Americans with Disabilities Act (ADA) requires a slope of no more than 1:12 for wheelchairs and scooters for business and public use, which works out to 1 foot (305 mm) of ramp for each one inch (25.4 mm) of rise. For example, a 20-inch (510 mm) rise requires a minimum of 20 feet (6.10 m) in length of ramp.

  3. Cross slope - Wikipedia

    en.wikipedia.org/wiki/Cross_slope

    Cross slope, cross fall or camber is a geometric feature of pavement surfaces: the transverse slope with respect to the horizon. It is a very important safety factor. Cross slope is provided to provide a drainage gradient so that water will run off the surface to a drainage system such as a street gutter or ditch.

  4. Drainage gradient - Wikipedia

    en.wikipedia.org/wiki/Drainage_gradient

    Typically on straight road sections, the drainage gradient is at least 1–3% due to the normal cross slope of 1–3%. In curved sections the drainage gradient is higher, and may often reach 5–12% due to superelevated CS that may reach 5–8% in areas with icy roads and up to 12% in areas without icy roads.

  5. Noncompliant downtown parking decks get ADA upgrades ... - AOL

    www.aol.com/noncompliant-downtown-parking-decks...

    For premium support please call: 800-290-4726 more ways to reach us

  6. Americans with Disabilities Act of 1990 - Wikipedia

    en.wikipedia.org/wiki/Americans_with...

    Certain issues were resolved in federal court. One issue, whether sidewalks were covered by the ADA, was appealed to the 9th Circuit Court of Appeals, which ruled that sidewalks were a "program" under the ADA and must be made accessible to persons with disabilities. The ruling was later appealed to the U.S. Supreme Court, which refused to hear ...

  7. Geometric design of roads - Wikipedia

    en.wikipedia.org/wiki/Geometric_design_of_roads

    The cross section of a roadway can be considered a representation of what one would see if an excavator dug a trench across a roadway, showing the number of lanes, their widths and cross slopes, as well as the presence or absence of shoulders, curbs, sidewalks, drains, ditches, and other roadway features.

  8. Cant (road and rail) - Wikipedia

    en.wikipedia.org/wiki/Cant_(road_and_rail)

    In civil engineering, cant is often referred to as cross slope or camber. It helps rainwater drain from the road surface. Along straight or gently curved sections, the middle of the road is normally higher than the edges. This is called "normal crown" and helps shed rainwater off the sides of the road. During road works that involve lengths of ...

  9. Diverging diamond interchange - Wikipedia

    en.wikipedia.org/wiki/Diverging_diamond_interchange

    Pedestrian (and other sidewalk-user) access requires at least four crosswalks (two to cross the two signalized lane crossover intersections, while two more cross the local road at each end of the interchange). [42] [41] This could be mitigated by signalizing all movements without impacting the two-phase nature of the interchange’s signals.