The rollout of new speed cameras and upgraded red light cameras are bringing in tens of millions of dollars in additional revenue to the Queensland Government.

Key points: The latest State Government figures show $396 million was raked in last financial year from fines and forfeitures

The latest State Government figures show $396 million was raked in last financial year from fines and forfeitures Deputy Opposition Leader Tim Mander said more signage should be considered instead of more cameras

Deputy Opposition Leader Tim Mander said more signage should be considered instead of more cameras Treasurer Jackie Trad said the cameras were proven to effectively reduce serious accidents

The latest State Government figures show $396 million was raked in last financial year from fines and forfeitures, but this year more than $444 million will pour into the state's coffers.

By the 2020-21 financial year, that figure will surpass half-a-billion dollars.

It includes revenue from fixed, point-to-point and red light cameras, as well as other penalties issued by the Department of Transport and Main Roads and the State Penalties Enforcement Registry.

Deputy Opposition Leader Tim Mander said more signage should be considered instead of more cameras.

"It's an extraordinary amount of money and we want to make sure that this isn't just a way for the Palaszczuk Government to revenue raise," he said.

"They need to ensure that these speed camera locations are directly linked with improving road safety.

"One way to ensure this is to end this practice of covert speed cameras — having high-visibility signage is as much of a speeding deterrent than a monetary fine itself."

$ (millions) 2017-18 actual 2018-19 revised 2019-20 projection 2020-21 projection 2021-22 projection Red light camera fines $11.9m $14.1m $15.6m $17.1m $18.8m Other camera-detected offences $6.4m $7.2m $7.6m $8m $8.7m Other fines and forfeitures $217m $234m $239.9m $257.8m $253.3m Speeding fines $160.6m $189.4m $206.3m $222m $237.2m TOTAL $396m $444.7m $469.4m $504.9m $518m

A spokeswoman for the Department of Transport and Main Roads said new cameras are being positioned in areas of greatest risk.

Proposed upgrades to red light cameras would provide the capacity for the devices to also detect speeding.

"These cameras are installed to prevent deaths and serious injuries on our roads," the spokeswoman said.

"Ideally no revenue would be collected from the Camera Detected Offence Program (CDOP), however any money collected in excess of running the program is required to be reinvested into road safety programs such as Safer Roads Sooner, community road safety grants and flashing school zone signs.

"The Queensland Government uses speed and red light cameras as a way to reduce road trauma, not to make money.

"It is important to remember every fine is issued to someone who was doing the wrong thing."

Treasurer Jackie Trad said the cameras were proven to effectively reduce serious accidents.

"Speed and red light offences are recognised as life endangering and are a major cause of road accidents," she said.

"In addition to the tragic loss of life, these accidents place a high cost on the community each year through hospital and health care costs, lost productivity and the use of emergency services.

"Cameras are installed in locations of greatest risk, not revenue, as a means to reduce serious injuries on our roads."

The latest figures were revealed in an answer to a question on notice in Parliament.