ADA (American's with Disabilities Act) has been around for a long time. Probably dates to Ronald Reagan as president.
A couple of notes.
Teton National Park has a public access cable-tram that will carry anyone to the top of the Teton Mts. Part of the 50 million spent on the project has to be ADA. Recent news from the Grand Canyon about a blind hiker who did a double rim to rim hike in one day. Another Grand Canyon story about a paraplegic, with his family, who did a hike to the bottom and back. A lot can be done even with handicaps, IMO.
It has taken quite awhile, but at this point in time, many large scale remodel projects, that I have worked on, incorporate some, if not all, ADA requirements. Not uncommon to see elevators added to relatively old buildings. Last (three) Church remodels, that I worked on, had elevators install, as did one new car showroom.
We have been painting the blue handicapped parking on lots for a long long time.
IMO, ADA will change the classic small town main street look, that is the OGR Ameri-town model Series. Many old multi-story buildings, just are not upgrade-able to ADA standards. In the next 15 to 20 years you will see a lot of empty holes in those old main streets. IMO. Mike CT