Victoria's long weekend holiday road toll has reached eight after a female driver died in Harcourt.
In the latest collision during a horror Labour Day break, the woman died when her car collided with another vehicle on the Calder Highway about 3pm on Sunday.
Her female passenger was airlifted to hospital in a serious condition, while four males in the other car were uninjured.
Assistant Commissioner Bob Hill said on Monday it was concerning that 14 more people had died on Victorian roads than at the same time last year, with speed a major factor.
"It's a disturbing trend and we need to turn it around," he told Fairfax Radio.
"What I do see time and time again is that the large majority of these collisions relate to speed."
In the most serious of the crashes, four people were killed in a head-on in the state's north on Saturday night.
It's alleged the teenage driver was drinking for much of the day of the crash at Burramboot.
Witnesses have also told police he was hooning and driving at excessive speed before the tragedy.
Late on Sunday, a male motorcyclist aged in his 30s died after colliding with a car in Melbourne's north.
It came after a woman was killed when her car left the road and hit a tree near Maryborough on Sunday afternoon.
In the first of the weekend fatals a man died after crashing into a tree at Glen Park near Ballarat on Saturday morning.
The weekend deaths came with a veteran sergeant speaking out about a police policy of booking low level speeders.
Sergeant Phil Wild, a 42-year veteran, told News Corp the push to book low level speeders would turn people against the police.
"The consequences of this flawed and unfair policy will be felt by the mostly law-abiding members of the motoring public, the mums and dads who are struggling to make ends meet whilst feeding and educating their children and wondering whether they will still have a job when their employment contract expires in the next few months," he said in a letter to Chief Commissioner Ken Lay.
However, Mr Hill said there was clear evidence to support the policy, including that 20 per cent of road trauma in NSW was a result of low level speeding.
