UPDATE11.30am: The road hs been cleared and State Highway 1 is open again.
UPDATE 10:30am: Police are waiting on a heavy tow for the truck involved in this morning's fatal crash.
It is likely the detours will be in place for at least another two hours.
"We are trying to clear the scene as quickly as we can. Thanks for everyone's understanding and drive carefully out there today," a police spokesperson said.
Diversions in place are through Callaghan Rd into Otira Rd through to Morewa.
UPDATE 9.25am: A fatal crash investigater is on the way to the scene on State Higway 1 which remains closed.
Traffic is being diverted through rural roads around the site and police are urging motorists to take extreme care on those roads.
Police said the driver of the truck suffered mnior injuries and was taken to hospital as a precaution.
A male driver of a car has died after a collision between a truck and a car in Northland.
The crash happened just after 7.30am today on State Highway 1 north of Maromaku.
Police said the road was "completely blocked" while emergency services attended the crash.
Motorists are being asked to delay travel if possible and expect delays.