Police have reminded road users to act responsibly after three people died on NSW roads since Friday, June 7.
NSW Police said they had detected a number of motorists making poor decisions on the roads.
Police said a 25-year-old Bomaderry man died and another man was in critical condition after a two-vehicle crash at Berry on Saturday afternoon, June 8.
A 91-year-old man died after he was involved in a multi-vehicle crash north of Crookwell on Friday afternoon, June 7.
The same afternoon, a 34-year-old male motorcycle rider died after he was involved in a crash involving a truck in Riverstone.
Since the start of the long weekend, police there was a total of 2,235 speed infringements, 106,860 breath tests, 106 PCA charges and 140 major crashes.
Assistant Commissioner Michael Corboy of the Traffic and Highway Patrol Command said he was disappointed with some driver behaviour.
"We have already seen a number of motorists take unnecessary risks on the road this long weekend," Assistant Commissioner Corboy said.
"After the recent wet-weather conditions, we don't want to see an increase in road trauma following the conclusion of this operation," he said.
"Road fatalities have a tragic effect on everyone involved, from the families who must grieve a loved one, to the police who attended the crash, and the communities who have lost one of their own."
"It's simple: Slow down and Stay Alert."
"Operation Stay Alert" commenced at 12.01am on Friday, June 7, and will conclude at 11.59pm on Monday, June 10.
Double demerits are in force throughout the period.
Police said officers would be a highly-visible presence on the roads during the operation, targeting speeding, mobile phone use, seatbelt and motorcycle/helmet offences, alcohol, drug-affected drivers, and fatigue.