The new rule requires motorists to slow down to 40km/h when an emergency vehicle is stopped and has its red or blue lights flashing on all roads.

More than 60 per cent of respondents to a Fairfax poll said they believed the new rule would give police licence to raise revenue for the State Government.

But nearly 40 per cent thought the new rule was a legitimate attempt at providing a safe work environment for emergency services workers.

"This is just another rule that will be abused by the authorities to raise revenue. I can see it now, stop beside the road, get radar gun ready, turn on lights as soon as somebody approaches, book them, turn the lights off and repeat the procedure," Fairfax reader Grant Pollock said.

However, A National Party spokesperson said safety around emergency vehicles on the roadside needs to be addressed, and that is what the 40km/h trial was all about. 

"To suggest it’s about revenue raising is honestly quite offensive to the workers and tireless volunteers this change is seeking to protect," the spokesperson said.

"It’s been widely supported by our local emergency services, which we will continue to work with throughout the trial to examine the systems in place and what we may need to change to ensure they make it home to their families after work. 

"If police need to stop a vehicle on the road, part of their operating procedures dictates that they will always try to do this in a safe location that can easily be seen by approaching drivers, so there is enough time to slow down safely.

"We will look at other measures to help drivers slow down like warning signs on the roadside. The trial doesn’t start until September and up until then, we will be working closely with the emergency services to look at ways to have in place systems like advance warning signs for major incidents to allow sufficient warning to safely comply with the new rule."