The South Australia opposition has called for an audit of the state's speed cameras to ensure they're being deployed for safety reasons and not just to raise revenue.
The government has allocated funds in the state budget to install another 10 fixed speed cameras which will raise an extra $15 million in fines over the next four years.
But opposition police spokesman Stephan Knoll fears the new cameras are "just another cash grab dressed up as a safety initiative".
"The government is addicted to taxation and slugging motorists is one of its favourite past times," Mr Knoll said.
"I want proof that every speed camera in South Australia is placed where its road safety impact is highest, not where it's going to make the most money."
Treasurer Tom Koutsantonis said the government did not decide where speed cameras were located and all the money raised went directly to road safety measures.
"We just want people to live longer," he said.
"It's something that they (motorists) don't need to pay."
In 2012/13, the number of mobile and fixed speed camera expiations was in SA 131,481 and that rose to 195,721 in 2015/16.
