Without a doubt, access to transport is the biggest obstacle in the path of people with disabilities.
But transport is the controversial exception from the Disability Discrimination Act.
So while a train station itself must be accessible – be it through wheelchair ramps, hearing loops or timetables in Braille – the trains themselves do not yet need to be.
Since March 2001, taxis have been required to carry guide or other assistance dogs, unless the driver has a medical exemption.
New buses and trains must provide for physical accessibility. But there is no "end date" set for universal access. The government says it will name the day in a forthcoming bill - but some train companies say the expected date of 2017 would be too soon.
Furthermore, companies are not currently compelled to bring in "new" vehicles – they are within their rights to buy and use old stock from elsewhere.
But concepts of transport access go much further than just a ramp. For instance, if someone finds it difficult to walk 400 metres to a bus stop, shouldn't bus companies stop to pick someone up along the way? At present they don't.
If a rail company will not change a foot bridge, should it provide a taxi, at its expense, to take a wheelchair user to the opposite platform?
These kinds of change, argue campaigners, would demonstrate how the obstacles created by society can easily fall away.