Citybound traffic between Oteha Valley Rd and Esmonde Rd was moderate to heavy at 6.45am, while congestion was heavy between Papakura and Takanini heading into the city.
Traffic was building in Princes St, in particular, authorities said.
Meanwhile, motorists heading into town on the Northwestern Motorway are also being told to expect delays from the Victoria Park Tunnel crash, which is causing delays in the Northern Link road.
Congestion is heavy between Hobsonville and Lincoln roads, while west-bound traffic is free flowing; as is traffic in the Waterview Tunnel.
Those travelling on the Southern Motorway, southbound, should know traffic is congested through Hillsborough Rd. Otherwise, traffic is free-flowing northbound.
