More than $10.66 million was collected for red light speed cameras in 2017/18.

That amount was forecast to increase to $14.12 million next year, figures released during estimates hearings revealed.

Revenue from fixed speed cameras was $54.02 million last financial year and forecast to increase to $59.25 million.

Transport Minister Mark Bailey said crashes at intersections were among the most serious.

"These crashes are often side impact crashes, or crashes involving pedestrians," he said.

"Even at low speed, this significantly increases the risk of death or serious injury."

Mr Bailey said if intersection crashes involved a speeding vehicle, the injuries to drivers and passengers hit could be much more severe and often fatal.

"The combined red-light speed cameras have continued to be an effective method for reducing speeds at intersections controlled by traffic light signals, as well as reducing intersection crashes involving speeding vehicles," he said.

"It is important to note that drivers caught by any red light or speed camera are almost always doing the wrong thing and risking their lives and the lives of other road users."

Mr Bailey said revenue from the Camera Detected Offence Program was used for road safety education and awareness programs, road accident injury rehabilitation and road safety-related infrastructure improvements.

During estimates hearings, LNP Transport spokesman Steve Minnikin asked if the increased fines were "more a reflection of the Palaszczuk Labor government's focus on revenue raising measures rather than attention to road safety?"

Mr Bailey said speed cameras were used as a way to save lives.

"Speed is one of the Fatal Five, people die on our roads from speeding, sadly, on a regular basis," he said.

"Speed cameras are a really important part of a wide array of actions that we bring into play to reduce our road toll.

"If you don't want to get fines, you don't speed, full stop. I wish we had no revenue from speed cameras because nobody sped - I can assure you, if that was the case we'd have an extraordinarily low road toll."

Mr Bailey said locations for speed cameras were chosen based on areas which had a history of crashes as a result of speeding.

"It is nothing to do with revenue that might be received from that location, and that's been the case across governments," he said.