A trolley train operator has been shut down after running an illegal service along the new North Brisbane Bikeway at Bowen Hills.

Members of cycling lobby group CBD BUG discovered the train offering rides between the RNA showgrounds and Gilchrist Avenue, near the Royal Brisbane and Women's Hospital.

Lobby group CBD BUG said the trolley train was a safety risk. Credit:Paul Martin

Spokeswoman Tae Baker said it appeared to have been shuttling people around one kilometre to the Queensland Caravan, Camping and Touring expo.

"It turns out the train guy had no permission from the organisers to run people over the bike path," she said.