In a horror weekend on the roads, 16 people have died in crashes in three states.
Since the beginning of the long weekend in NSW on Friday, eight people have died in the state, while there have been four deaths in Queensland and three in Victoria since Saturday.
Police have repeated calls for motorists to slow down following a series of horrific crashes.
The latest statistic was recorded in Victoria where a 43-year-old motorcycle passenger was killed when the bike she was on collided with a van at Narre Warren, in Melbourne’s outer southeast, at 3.45pm (AEDT).
Two male motorcyclists were also killed in separate crashes.
In the first accident, a 50-year-old man died when he struck a trailer parked on the side of the Murray Valley Highway at Lake Boga, just south of Swan Hill, about 11.25am (AEDT).
Less than an hour later a 46-year-old Clayton man struck a tree and died on the Mornington Peninsula about 12.15pm.
The man was riding with a group of motorcyclists when the accident happened on Boneo Road at Flinders, about 90km south of Melbourne.
In Queensland, the death toll climbed to three after a crash in Brisbane just before 3pm (AEST).
Police closed roads in the suburbs of Woodridge and Kuraby following the accident but no further details were available, a statement said.
Earlier on Sunday, a man was killed when his four-wheel drive towing a campervan hit a tree on Rainbow Beach Road, near Gympie, around 10am (AEST).
A woman passenger in her 50s who was badly injured died shortly afterwards.
A Tamworth man aged in his 40s became the eighth person to die on NSW’s roads over the long weekend when he was thrown from a car at Tooraweenah in the state’s central west early on Sunday morning.
Police say the station wagon left the Tooraweenah-Mendooran Road some time before 3.45am and rolled several times.
The man suffered fatal injuries while the female driver was taken to Dubbo Base Hospital in a stable condition.
Among those killed in NSW since the long weekend began on Friday are a six-year-old boy who was involved in a head-on collision between two vehicles at Hoxton Park in western Sydney on Saturday.
Another four people, including two sisters aged two and eight, and their mother, were killed in a crash involving a car and semi-trailer on Bells Line of Road at Bilpin about 8pm (AEST) on Friday.
Their car lost control as the driver overtook another vehicle and collided with the semi.
A 23-year-old Bidwill woman was also killed in that crash while the driver remains in a critical condition.
In a separate accident, a 48-year-old truck driver from Queensland died when his B-double hit an embankment on the Pacific Highway north of Coffs Harbour, and just before 5am on Saturday, two factory workers discovered the body of a man in the driver’s seat of a wrecked utility at Narellan, southwest of Sydney.
The 48-year-old St Andrews man was killed after his Toyota collided with a Holden utility, believed stolen.
Also on Saturday, one person died after a collision between a truck and two cars on the Bruce Highway in southeast Queensland.