A car has flipped on the Southern Motorway causing traffic delays for motorists in peak hour.
Police are now trying to locate a fleeing driver.
The crash, northbound near Otahuhu, occurred at at 5.42am when a vehicle crossed two lanes, causing another two cars to collide, one of which has flipped, police said.
The vehicle which crossed the two lanes left the scene and police are trying to locate the driver.