The first Revenue NSW data released since the warning signs started being phased out showed Docker Street's northbound lanes in Wagga generating 942 per cent more speeding fines than a year ago.

Transport for NSW Deputy Secretary for Safety, Environment and Regulation Tara McCarthy said removing warning signs would encourage safer driving at all times and locations.

"The increased number of people caught supports what we have been saying and what the statistics show - speeding, which is the leading cause of death and trauma on NSW roads, has been increasingly problematic over the last year during the pandemic," she said.

"We have seen how having no warning signage for mobile phone detection cameras has deterred people from using their phones illegally behind the wheel [and] we want the same effect with speeding.

"The changes to the Mobile Speed Camera Program are designed to make our roads safer by reducing speeding across the state - not just when a driver or rider sees a camera."

During December last year, mobile speed cameras generated more than 400 infringement notices across Wagga and the Riverina, for nearly $76,000 in total penalties.

Able Driving School instructor Glen Gaudron has said the increase in fines was "pure revenue raising" and Wagga-based Nationals MLC Wes Fang has said he was concerned about drivers on roads with few speed limit signs.

Docker Street's northbound lanes in Wagga topped the list with 218 fines, followed by Tarcutta Street with 77, with Lake Albert Road recording 31 fines from cameras at Kooringal and Lake Albert.

Snowy Mountains Highway at Tumut and Edward Street eastbound at Wagga both recorded 14 fines, and Junee's Main Street recorded 11 fines.

Ms McCarthy said all fines will be reinvested through the Community Road Safety Fund for safety upgrades such as rumble strips and safety barriers.

"We expect to see numbers stabilise and decrease once the full changes to the speed camera program are implemented over the next year and as motorists begin to get the message that just like using a mobile phone and being caught by a mobile phone detection camera, they can, and will, be caught anywhere any time on the NSW road network by mobile speed cameras too," she said.

"The power to avoid penalties for speeding is totally in the control of the driver."