Motorists are experiencing delays on Auckland’s southwestern motorway after a car crash.

The crash had blocked the middle lane on State Highway 20 causing a traffic hold-up.

A fire truck could be seen responding to the scene and two were en route.

A car crash on Auckland's southwestern motorway has held up traffic. Photo / Chris Keall

Waka Kotahi NZ Transport Agency said the crash was just before the Hillsborough Rd off-ramp and had been blocking all northbound lanes.

 “Pass left via the shoulder with care and expect delays”, it said.

A police spokesperson said the crash site had now been cleared.