LICENSED carrier operators have aired their grievances over the number of illegal carrier operators operating in the Savusavu-Labasa corridor.
Vanua Levu Carriers Association president Samuel Prasad said these illegal operators were stealing money that legal operators were entitled to.
Mr Prasad said it was unfair on those who had paid for a licence to operate.
"We depend on money we make from this business because most roads on Vanua Levu are only accessible by carriers because of their rough terrains," he said.
"However, there are illegal operators out there who are having a free ride while licensed operators pay the required fees to operate.
"This is unfair and we require the authorities to step in and monitor these illegal operators."
Another carrier operator, John Kumar, said the problem was serious in Savusavu.
"Four-wheel owners are the ones who commit this crime a lot," he said.
"They need to be stopped because there are people like us who depend on this money to put bread and butter on our table every day."
Meanwhile, LTA chief executive Naisa Tuinaceva said he was not aware of the matter.
He has encouraged carrier operators in the North to lodge their concerns with him personally.