There was a local news story here just the other day about black cab taxi drivers refusing to take disabled people in wheelchairs. A taxi driver was disciplined on one particular occasion.
I have some issues when my arthritis is bad. I am reliant on public transport and it can be daunting, especially around city rush hour, if you can't get a seat and the buses go so fast it can be difficult getting sat down before they take off at speed or getting up to get off (if you don't there is a high chance you will miss your stop) or have to get up anyway to ring the bell.
With general city road issues there are often instances of a bus driver having to slam on the brakes and, with the speed at which a lot of them go, it can be hard to hang on sometimes (I've nearly ended up in a few laps!).
I wonder how many people who need wheelchair space it puts off as many people sit in those seats anyway or it can get so crowded they couldn't get in and the space is shared with pram pushchair space (I imagine parents have similar issues to many I've mentioned above).
I know from many years of volunteering with people with disabilities that some attitudes disgusted me as to the lack of respect and assistance shown to people with disabilities generally.