Mr Andersen said there needed to be a detailed analysis of each crash to determine what lessons, if any, could be learned. Even though truck crash deaths were falling, they were still higher than they needed to be.
He said there were about 50 deaths a year but they were disproportionate to the number of trucks on the roads. "Heavy trucks are over-represented in the statistics."
He was reluctant to comment on yesterday's crashes until he knew what the cause was - and that could be some time away as inquests often weren't held for months afterwards.
In the Kerikeri crash, one driver died despite a two-and-a-half hour battle by rescuers to free him from his crushed cab.
The crash happened when a truck carrying a container pulled out of a packhouse driveway and collided with a truck and trailer heading towards town.
The impact shunted the container from the K&S Freighters truck and crushed the cab of the PBT Transport truck, trapping the driver's head and legs.
Volunteer firefighters from Kerikeri and Paihia worked to free the driver, a painstaking process carried out in bitterly cold rain and occasional squalls, while St John medics tried to keep him comfortable and stable.
The truck's cargo - beer, large vats of honey, tyres and other goods - had shifted forward in the crash and was pushing up against the rear of the cab, so had to be removed before the driver could be freed.
Despite his injuries the driver was conscious and talking but deteriorated rapidly about 9am as his legs were freed from the wreckage. He had suffered serious crush injuries to his lower body.
Police have yet to release his name but he was understood to be from Auckland. The other driver suffered only minor injuries and was taken to Bay of Islands Hospital.
Fire Service Muriwhenua area manager Allan Kerrisk praised emergency personnel for a "tremendous effort in trying conditions".
"They are obviously disappointed with the outcome, but know they've done the best they could."
Senior Sergeant Peter Robinson, of Kerikeri police, said emergency services had done everything they could to save the driver.
It was too early to say what had caused the crash or whether it could have been avoided.