Double Demerit Points (DDP) are hailed by Staysafe and our governments as the saving grace of holiday periods when the road toll becomes a politically sensitive topic. Problem is as we know that these DDPs only concentrate on speeding and seatbelts with the vast majority of Policing concentrated on Kodak-Copping.
Without bias the best source of data is the ATSB which conveniently posts road toll date for each holiday period. In this case the data represents the road toll across the actual DDP period coinciding with Xmas-New Year.
Make your own conclusions.
Note; DDP was introduced at the Easter Holiday period 1997.