A VICTORIAN man who has skateboarded the Nullarbor to raise money for charity has copped a traffic fine and told to stay off the highway.

Geelong musician Aaron Salta was shocked after a South Australian motorcycle police officer yesterday fined him $108 for riding a "toy" on a road that has a speed limit greater than 50km/h, the Herald Sun reports.

Mr Salta, 30, is less than 200km north of his destination of Adelaide, after setting out from Norseman in WA on a 2000km journey to raise awareness about depression.

Mr Salta said: "I'm completely devastated. I've put over $10,000 of my own money into buying a van and all the stuff needed for this trip.

"He was completely unreasonable. He didn't want to call any other officers for their opinions."

Support crew member Sean Mclaughlin said the skateboarder and support van had been pulled over by several police without any problems before the incident near Crystal Brook.

"Every cop that we've spoken to has been behind it except this one guy - he just got his back up," he said.

Mr Salta, who suffered depression as a youngster, has raised almost $12,000 and put up with excruciating pain during the journey. He had been averaging 100km a day and managed to cover 144km on his best day.

But the trip is on hold because Mr Salta fears being arrested.

An SA police spokesman said people could apply for exemptions from sections of the road rules, but it should be done before the start of such activities.

"SA Police will speak with the man and supporting the organisation in relation to this, and will facilitate the processing of an application for an exemption under the Road Traffic Act," he said.

Only after calls from the Herald Sun, SA Police said that while the fine would stand, they would help Mr Salta obtain a permit.

Read more at the Herald Sun.