NSW is rolling out new technology to spot drivers using their phones.

Minister of Roads Andrew Constance and Minister for Regional Roads Paul Toole says the new cameras will be used to crack down on drivers illegally using their mobile phones while driving.

The state has run a six-month pilot program with tech company Acusensus, catching over 100,000 drivers using their phones illegally.

“Unfortunately some people haven't received the message and think they can continue to put the safety of themselves, their passengers and the community at risk without consequence,” Mr Constance said.

“There is strong community support for more enforcement to stop illegal mobile phone use with 80 per cent of people we surveyed supporting use of the mobile phone detection cameras.”

The new system uses fixed cameras mounted above cars at traffic lights and freeways, as well as relocatable trailer-mounted versions of the technology that will travel state-wide.

The program seeks to perform 135 million vehicle checks annually by 2023.

“We know the success of the pilot and other enforcement technology programs that the deployment of the Acusensus Heads-Up solution will driver behavioural change and improve the safety of road users,” said Acusensus managing director Alexander Jannink.