A woman in a wheelchair was left stranded in a Brisbane railyard after Queensland Rail employees forgot to help her disembark from a train, with Deputy Premier Jackie Trad since apologising to the woman.

Karin Swift was catching her regular train to work last Tuesday morning when she informed staff at Central Station she would need help to get off two stops later at Bowen Hills.

When she arrived, no-one came to help her disembark and before she knew it the train was pulling away from the station.

"I started to scream out thinking someone would realise what had happened and come and no-one did," she said.

"Next thing I know the train is pulling into some kind of train storage space and I'm pretty much left for dead."

The 44-year-old was unable to reach the emergency button, but managed to find a Translink phone number on her go card and told the person on the other end of the call of her predicament.

"It took about 45 minutes to get another crew on board and move the train back to Bowen Hills, and it was really scary," she said.

Ms Swift said she was more than 90 minutes late for work and had been left feeling traumatised.

"That night I had a dream that I was experiencing the same thing, but my phone battery was flat and I was unable to call anyone," she said.

Ms Trad has apologised on behalf of the Government.

"It's indefensible, it should not have happened," she said.

But disability advocate Geoff Trappett said it was far from an isolated case.

"This incident with Karin is one of five I've heard of in the last few days and that speaks volumes about the incidents that are occurring, and that people with a disability are used to being treated this way," he said.

Disability advocate Geoff Trappett says the incident is not an isolated case. ( ABC News: Dea Clark )

It has prompted a change in Queensland Rail policy, with station staff now required to remain with anyone requiring help on a terminated train until the guard comes to assist.

Design flaws need to be fixed in new trains: advocate

Disability advocates said these types of incidents highlighted their concerns with State Government proposals to fix access problems in the $4.4 billion New Generation Rollingstock project.

Design flaws mean people in wheelchairs would still need assistance to get on and off the new trains.

The guard space will be located at the rear of the train, and Mr Trappett said one of the proposals put forward by Queensland Rail was that two extra staff be located in the middle carriage.

But that plan came as a surprise to Ms Trad.

"I don't know where those reports have come from but that's not going to happen," she said.

Mr Trappett said the only real solution was for the New Generation Rollingstock to be redesigned.