One of the main routes out of Wellington is closed after a truck crashed.
State Highway 2 through the Rimutaka Hills is shut, cutting off the capital from Wairarapa.
Transport officials are warning of long delays. The only other option for motorists is to take a long detour through Palmerston North and the Manawatu Gorge.
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Traffic delays after truck crashes on Auckland's Southern Motorway
A police spokesman said emergency services were called about 3.45pm.