I am disabled.
All public buses in my city (London) are, in theory, wheelchair accessible, but their wheelchair/stroller ramps are poorly maintained and often do not work. Very few subway stations in my city are wheelchair accessible because they do not have elevators to the platform.
I do not use public transport.
All London taxis 'Black Cabs', are wheelchair accessible, and there are thousands of them in central London. However, I live in the suburbs and have to wait for a cab to be dropping someone off locally to get one into the centre. As a result, I use them infrequently.
I work from a home office which eliminates the need to commute. Because I do not commute, I travel less than 2500 miles each year by car.
For local trips, up to 1 mile radius of my house, I will ride my electric powered wheelchair, recharged from the mains supply. Ocassionally, in fine sunny weather, I will ride my chair within a five mile radius of my house (It has a battery range of 14 miles).
For trips too far to ride my chair, I use a wheelchair adapted minivan, converted to run on LPG (Liquid Propane Gas AKA Propane or Butane).
From http://www.lpga.co.uk/LPGA.htm "LPG emits similar CO2 to diesel and considerably less than petrol*. It is also much cleaner than diesel in terms of NOx and particulates which impact on our local air quality." (*translation UK "petrol" = US "gas")I understand that the safari vehicles at Animal Kingdom run on LPG.
For trips to WDW, I ride in a Boeing 747-400 London to Orlando, which cancells out all the carbon savings I make in the rest of the year. Perhaps I should visit
Disneyland Paris instead, because I can travel by train almost door-to-door.
Andrew