Six Dubbo school zones are still waiting for installation of flashing light systems to heighten driver awareness that they are entering 40 km/h school zones. Some are in busy traffic locations.

Other schools already have the system, which the NRMA said had been shown to work well.

The NSW government plans to have the lights in the remaining six schools by December next year.

In the year to June 30, Orana Highway Patrol recorded 111 fines with a value of almost $35,000 - an increase from 63 fines worth just more than $17,000 in the previous year.

There were 23 offences of exceeding the 40 km/h speed limit by 10km/h or under.

This was five fewer than in the previous year.

Exceeding the limit by more than 10km/h accounted for 77 offences - more than double the 31 for the previous year.

There were 10 offences for exceeding the limit by 20km/h or more and were more than double the rate for the previous year.

One motorist was charged $1028 when they exceeded the speed limit by more than 30km/h.

NRMA Western NSW director Graham Blight said the flashing lights initiative had been proven to work.

"If there's a flashing light there's more chance people will see the sign," he said.

Mr Blight said a survey found too many people missed the signs.

"It gives notice for people when they are driving through school zones to slow down," he said.

"The system is working well, we'll be happy once it's finished."

Dubbo MP Troy Grant said: "Of late we have heard of too many incidents where a child has been struck by a vehicle."

"This is another measure at making drivers aware they are entering a school zone and need to slow down to 40 km/h."

He said a full schedule for the next stage of the flashing lights project was still being finalised and would be announced soon.

"All schools in Dubbo that do not currently have flashing lights will receive them under this expanded program and the Roads and Maritime Services has consulted with schools on the best location of the lights," he said.