Until December last year, signs alerting motorists of upcoming mobile speed cameras were provided - but not mandated - in NSW, however a government crackdown resulted in their removal along with the number of cameras and hours of operation being tripled.

High-visibility decals on mobile speed detection vehicles were also reduced, or removed completely, with figures from the State Revenue Office showing the significant increase in the number of tickets being issued month-to-month.

From January through April, collectively, there has been 744 speeding infringements issued at a value of $127,890. Incredibly, that four-month total marks a whopping 201 per cent increase from the 247 offences reported in entire year prior to that.

There was 278 of those issued in February alone, while in April 140 offences were reported around Orange compared to just five reported in the same month of 2020.

At least 75 per cent of those infringements in 2021 have been issued as a result of offences detected by cameras on Molong Road and Woodward Street, with the spike most notable in the former area in particular.

There has been 324 offences detected on Molong Road from January through April compared to just 17 in the same period of 2020, a monumental increase of 1,805 per cent.

Operations did ramp up in the area at the beginning of the new financial year, but even between July and December last year there was less than half of this year's tally collectively, with 141 offences detected on Molong Road in that period.

A number of motoring lobby groups, including the NRMA, have questioned whether unmarked cars will change behaviour at all or are merely revenue-raising devices, however the government remains unrepentant.

Maintaining his stance the initiative makes roads safety, Minister for Regional Transport and Roads Paul Toole sent a simple message to anyone questioning the move.

"If you drive to the speed limit you won't get fined. If you're not doing the wrong thing you have absolutely nothing to worry about," he said.

Mr Toole suggested drivers 'need to change their culture' and concern should shift from the number of fines being dished out to how many motorists are still choosing to speed on roads in Orange, the wider region and the state.

"It's scary how many people are driving about the speed limit," he said.

"(They're) putting not only their lives but everyone else at risk (too). No one likes getting a fine in the mail but what is far worse is getting a knock on the door saying your loved one has been seriously hurt or killed in an accident involving speed."

Mr Toole welcomed an inquiry by the Joint Standing Committee on Road Safety into the government's mobile speed camera program, which was announced last week.

"At the end of the day it's about saving lives," he said.

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