Wheelchair user Doug Paulley relies on buses in Leeds to get around.
But he could be left stranded after the Court of Appeal ruled his needs "do not trump" others if the wheelchair bay is being used by buggies.
Mr Paulley told ITV News: "If wheelchair users aren't using it, I don't have a problem with other people using it. But if a wheelchair user needs it, then that's the only place they can be on the bus, and they must have priority."
Only new legislation in Parliament or the Supreme Court can change this, but as it stands if people don't want to move on public transport, they don't have to.
ITV News Correspondent Richard Pallot reports:
First Bus has said it recognises "how important it is" that disabled customers can access its services.
The verdict has given our passengers, drivers and the wider industry much needed clarification around the priority use of the wheelchair space on board buses, following two previous conflicting rulings.
Our current policy, which is to ask other passengers in the strongest polite terms to make way for those who need the space, will remain in place.
We recognise how important it is that bus services are accessible for all customers - indeed we are leading the industry in improving bus travel for disabled customers. That good work will continue.
The comments follow a Court of Appeal ruling that bus companies are not required by law to have a policy to force parents with buggies to make way for wheelchair users in designated bays on buses.
A legal ruling won by a disabled campaigner from West Yorkshire about a bus company and its wheelchair policy has been overturned at the Court of Appeal.
Doug Paulley from Wetherby, took First Bus Group to court after he was told he could not get on a bus because a pushchair user refused to give up the space. That "first come first served" policy was unlawful discrimination said a judge in Leeds.
However three judges today said bus companies are not required by law to to force parents with buggies to make way for wheelchair users in designated bays.
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The incident in Leeds today where a man was able to run into David Cameron on the street has raised questions about security arrangements for the prime minister.
While most British politicians prefer not to be surrounded by a "ring of steel", the incident has prompted an investigation by the Metropolitan Police, which is responsible for Mr Cameron's safety.
ITV News political correspondent Libby Wiener reports:
A runner who collided with the Prime Minister prompting security concerns has told the BBC he "did not see him."
Dean Farley said: "I didn't see David Cameron. I didn't know it was David Cameron until they let me out of the police van an hour later and told me what I'd actually done."
He said he asked the officers repeatedly what he had done as he was detained in the van and one officer said to him: "You know what you've done, be quiet."
"I gathered I'd run into somebody quite important but I couldn't know it was David Cameron. It begs the question, how good is Cameron's security if I managed to run between it before they stopped me?", Mr Farley added.
Mr Farley denied the collision was some sort of protest, adding that he was "not a particularly political-minded person".
David Cameron insisted he has confidence in his protection detail after a runner collided with him during a visit to Leeds.
The Met Police announced it will carry out a review into the incident, which some MPs have called a "clear breach of security".
ITV News Political Correspondent Libby Wiener reports:
The man who collided with David Cameron while running has said he just brushed into someone.
"Next thing I know I've got half a dozen suited men haranguing me and manhandling me to the floor," Dean Farley told the BBC.
"The whole time I'm asking, 'who are you, what's going on?'" he added.
The mother of the man who collided with David Cameron earlier today said he was "very upset by the whole situation".
Dean Farley's mother said she had spoken to him and that it was "all a misunderstanding."
"He was just jogging to the gym," she said, adding, "That's all I've got to say."
A witness to the incident involving David Cameron in Leeds today has described how the Prime Minister "sidestepped" the 28-year-old man in a "lovely little move".
Chris Wilson said: "It looked like Cameron sidestepped him. It was a lovely little move. He should be on the stage, really. And then he was tackled by the person behind. And then he [Cameron] was in the car and the car was gone."
He added: "They were on him. They were like flies round poo. One minute he was down, then he was up again and moving. It was fast."
He ran about 10 yards across the road towards the Prime Minister, who looked around, but did not seemed worried, Mr Wilson said.
Dean Farley later said on Facebook that he was the man involved in the incident.