The government has confirmed it is considering removing warning signs on the approach to fixed and mobile speed cameras.

It comes a week after the Newcastle Herald revealed how the Hunter's 23 fixed cameras netted $10.5 million in fines revenue over 18 months.

Scrapping the signs would also follow the government's plan to introduce mobile phone detection cameras next month without signage.

"This isn't revenue raising, this is about saving lives," Mr Constance said on Monday.

"Red-light speed cameras reduce fatalities by 74 per cent. The road toll is up and it's time for action.

"Fines from speed cameras go into the community road safety fund, not government coffers. This is about getting drivers to do what they should have done in the first place - not speed."

Mr Constance said 310 people had died on NSW roads so far this year, which was 16 more than this time last year, and the government was "going to have a look at everything, given this year's road toll".

He quoted Monash University research which suggested "up to 54 lives could be saved every year if we remove [the warning signs]".

"The number of people being injured is ridiculous and yet we're the only Australian state that has this signage," he said. "People need to understand they can be caught anywhere on the road network at any time doing the wrong thing. We want people to experience the same threat as the random breath test."

However, the NRMA said warning signs played a role in reducing crashes at high-risk locations.

"We support the use of cameras and we support the use of warning signs .. they play an important role in education," NRMA spokesman Peter Khoury said.

"Speed cameras are put in locations with a crash history and, without the signs, we would miss an opportunity to tell people to slow down."

There are 139 fixed speed cameras, 191 red-light speed cameras and 45 mobile speed cameras in NSW.

NSW Auditor-General Margaret Crawford said, in a report released last year, that warning signs ahead of mobile speed camera had hampered the ability of the technology to effect a change in driver behaviour through deterrence.

Last year, fines from the state's cameras totalled $176.8 million across 603,800 penalty notices.

All fines from speed and red-light cameras go into the community road safety fund, which is used to pay for engineering works, public education campaigns, community grants and increased enforcement by the police.

Fines issued by police do not go into the fund.