How Accessible Are the Buildings to Persons Who Are in Wheelchairs, Blind, or Hearing-Impaired?

I am legally blind and I am hearing impaired…so:
A lot of buildings which I have to enter do not have a wheelchair ramp right next to the steps—you have to go to another side of the building to access it with a wheelchair. When I need an elevator I am at a total loss….the elevators got a ding-dong sound when they come but not loud enough to distinguish when background noise is at a high level(as is the case in most hospital buildings). Additionally, rotating doors often are placed at an entrance with no door at the side to choose–again, you have to go somewhere else in the building to find a normal door. Sidewalks are often rough—they are not well maintained and I can see how people in a wheelchair have a hard time getting forward on them—and at some curbs there is still no wheelchair ramp making it impossible for persons in wheelchairs to croos a street. Street lights are pretty much the worst: I think that they should have a beeper so that blind people know when to cross—hearing impaired people can often hear the beep with hearing aids on, but if they are totally deaf, I don't really see how they can make it in busy areas……looks to me like a lot of work still needs to be done…..