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Q: Does a city have to provide curb ramps at every intersection
on existing streets?
A: No. To promote both efficiency and accessibility, public entities may
choose to construct curb ramps at every point where a pedestrian walkway intersects a
curb, but they are not necessarily required to do so. Alternative routes to buildings that
make use of existing curb cuts may be acceptable under the concept of program
accessibility in the limited circumstances where individuals with disabilities need only
travel a marginally longer route. In addition, the fundamental alteration and undue burden
limitations may limit the number or curb ramps required.
To achieve or maintain program accessibility, it may be appropriate to
establish an ongoing procedure for installing curb ramps upon request in areas frequented
by individuals with disabilities as residents, employees, or visitors.
However, when streets, roads, or highways are newly built or altered,
they must have ramps or sloped areas wherever there are curbs or other barriers to entry
from a sidewalk or path. Likewise, when new sidewalks or paths are built or are altered,
they must contain curb ramps or sloped areas wherever they intersect with streets, roads,
or highways. Resurfacing beyond normal maintenance is an alteration. Merely filling
potholes is considered to be normal maintenance.

4.7.7 Detectable Warnings.
A curb ramp shall have a detectable warning complying with
[more]

The detectable warning shall extend the full width and depth of
the curb ramp , , ,
4.29.2* Detectable Warnings on Walking Surfaces. Detectable warnings
shall consist of raised truncated domes with a diameter of nominal 0.9 in
[more]
4.29.5 Detectable Warnings at Hazardous Vehicular Areas
[more]
4.29.6 Detectable Warnings at Reflecting Pools. The edges of reflecting
pools shall be protected by railings, walls, curbs, or detectable warnings complying with
4.29.2...[more]

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