Manning Great Lakes highway patrol supervisor sergeant Michael Martin has urged the local community to heed police advice while on the roads this long weekend.

Double demerits will be enforced during the annual Operation Stay Alert road safety campaign, which began at midnight today, June 9 and runs until 11.59pm on Monday, June 12.

It will apply for all speeding, seat belt, mobile phone and motorcycle helmet offences during this period.

Following an increase in road fatalities in the Manning and Great Lakes area, the Local Area Command launched Operation Magneto during May.

Sergeant Martin said several highway patrol officers from outside the area have been brought in to support local staff.

"The increase in police presence has caused our crash rate to go down from what it was earlier in the year.

"We've had a 23 per cent reduction for the number of injury crashes compared to the same time last year and our traffic crashes overall are down from the same period last year.

"The presence within the area has created a higher profile, its made motorists and members of the community more aware that police are out and about and it caused their driving behaviour to be modified significantly as shown in the reduction in crashes overall,” Sergeant Martin said.

Despite numerous warnings from the Manning Great Lakes command, Sergeant Martin conceded that the message will not always get through to motorists.

"There are always going to be people out there that think it doesn't apply to them and in a couple of instances where we had people driving excessively in regards to the speed limit.

"I think it is just people thinking it won't happen to them in their day to day lives where they have to get from point A to point B as quickly as they can.

"They are not paying attention to how they are driving around the town and they get complacent in regards to their driving behaviour,” Sergeant Martin said.

Since the start of 2017, 161 people have died on NSW roads.