Double demerits will be in force for speeding, seatbelt, mobile phone and motorcycle helmet offences this Australia Day long weekend.
The harsher penalties across NSW will kick in at 12.01am Friday and will last until 11.59pm on Monday.
Extra police will be on the roads as part of Operation Safe Return.
"The devastating fires that have affected our state over the past few months have shown how Australians can band together and support each other through thick and thin," NSW Highway Patrol commander Assistant Commissioner Michael Corboy said.
"We are asking drivers to extend upon this and draw upon the spirit of Aussie mateship to look out for each other on the roads, by being responsible and not taking unnecessary risks.
"This means staying well-rested by having a good night's sleep before you start your journey, taking regular breaks, not drink or drug driving, and sticking to or below the speed limit.
"By neglecting these responsibilities, not only are you putting yourself at risk, but you are also risking the lives of your passengers and everyone else you encounter throughout your journey."