Two separate incidents on Auckland's Southern Motorway that blocked lanes are expected to cause delays for motorists using the route.
The left southbound lane on State Highway 1 just after the Khyber Pass Rd on-ramp is blocked as a response crew cleans a spill caused by an earlier broken down vehicle.
Waka Kotahi asked motorists to merge with care and to expect delays through the Spaghetti Junction.
Vehicles involved in a crash were earlier blocking the left lane and the right lanes heading north on SH1 after the Ellerslie-Panmure on-ramp has just recently been cleared but delays are expected as congestion in the area clears.
Meanwhile, in the South Island, SH1 at Leithfield Beach in Canterbury is closed due to a crash. Detours are in place and Waka Kotahi advises motorists to take care and expect delays.
Police said in a statement three vehicles were involved in the crash, reported to police around 2.50pm, on the bridge over Kowhai River in the Amberley area.
St John said four vehicles were sent to the scene where two patients were treated. One was in serious condition while the second had minor injuries.