Your might not be from the US, so I can understand how you might have such an impression, but wheelchair ramps, although universal for new construction, are usu

Your might not be from the US, so I can understand how you might have such an impression, but wheelchair ramps, although universal for new construction, are usually not installed until either new construction occurs nearby or the sidewalk itself needs to be replaced unless a high traffic street. For example, although I think the installation of wheelchair ramps on sidewalks has been going on for at least 30 years, probably only about half of the curbs in my relatively-urban neighborhood have ramps.