All lanes have reopened on Auckland’s Southern Motorway after a crash but drivers should expect delays.

An earlier crash crash snarled the traffic, and the back-ups continued as vehicle recovery was being carried out along that section of State Highway 1, Waka Kotahi said.

Drivers should continue to expect delays north of Bombay as congestion clears.

Motorists were being warned about delays and major congestion between Bombay and Drury, and were asked to merge carefully.