The Transport Department says there have been many reports of drivers ignoring closures of outback roads in South Australia.
Heavy rain this week has forced several closures the state's far north and north-east, including the Cordillo Downs Road near the Queensland border.
All sections of the Birdsville Track are remain only open to heavy vehicles and four-wheel drives.
Allan Morris of the Department warns there are cars and trucks getting bogged on outback roads.
"The damage they're doing to these closed roads is significant and we'll be certainly pursuing with the police, if we can get numbers we will certainly be prosecuting," he said.
"They can do $200,000-$300,000 damage very easily and very quickly."
© ABC 2012
16:12 EST Queensland Opposition Leader Annastacia Palaszczuk says a flood tax would fly in the face of the State Government's promise to reduce the cost of living.