Wikipedia: The curb cut effect[a] is the phenomenon of disability-friendly features being used and appreciated by a larger group than the people they were designed for. The phenomenon is named for curb cuts – miniature ramps comprising parts of sidewalk – which were first made for wheelchair access in particular places but were also welcomed by people pushing strollers, carts or luggage. Curb cuts are now ubiquitous and no longer widely recognized as a disability-accessibility feature.[2][3] Another example is hearing people using television closed captioning.[4]

The curb cut effect is a subset of universal design, which is the purposeful design of an environment so that it is accessible to all people regardless of ability or disability.[5] The curb cut effect differs slightly from universal design, as the curb cut phenomenon is often unintentional rather than purposeful but results in a similar outcome.