A serious crash this morning on a citybound section of Auckland's Southern Motorway is causing major disruptions.

The crash closed a section of State Highway 1 between Ramarama and Drury citybound before 6am.

State Highway 1 between Ramarama and Drury has closed this morning citybound following a serious crash. Photo / Google Maps
State Highway 1 between Ramarama and Drury has closed this morning citybound following a serious crash. Photo / Google Maps

The road is now open but the NZ Transport Agency warns of heavy congestion.