Motorists are reminded to drive safe this long weekend, both for the safety of others and the sake of their own licence.
Double demerits will be in force from midnight tonight for some states and territories, but not all.
Complicating matters further, the long weekend is not shared equally around the country, so the usual holiday enforcement won't be on the roads in some places.
Here's where double demerits will be in force.
NSW and ACT
Both jurisdictions will enforce double demerit penalties for road offences from 12am Friday, September 29, until 11.59pm, Monday, October 2.
This is for the Labour Day holiday on Monday.
However, double demerits are not treated equally in both jurisdictions.
In NSW, double demerits apply to offences involving speeding, illegal use of mobile phones, not wearing a seatbelt, and riding without a helmet.
In the ACT, double demerits will apply to all speeding, seatbelt, and mobile phone offences.
All other traffic offences will attract an additional demerit point.
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Queensland
There will be double demerits in Queensland this weekend - but that's nothing new.
Double demerits are permanently in force in the Sunshine State, but they apply only to people who commit the same driving offence more than once in a 12-month period.
Western Australia
Western Australia does enforce double demerits during holiday periods - but it does not have a long weekend.
WA marked the King's Birthday holiday on Monday, September 25.
This weekend is business as usual.
Victoria, South Australia, Tasmania, Northern Territory
The remaining states and the NT don't have double demerits at all - though no doubt during public holidays there will be a sharp eye out for dodgy drivers.