The concrete spill on Auckland's Southern Motorway which caused traffic chaos has now been cleared.

Auckland's Southern Motorway southbound, between Market Rd and Greenlane, was partially blocked following a spillage of wet concrete which affected two of the three lanes.

Contractors had since cleaned up the spill and re-opened all the lanes, police said.

Traffic was backed up as far as Gillies Ave soon after the spill, the New Zealand Transport Agency said.

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Traffic is congesting around the Newmarket area. Photo / via Google Maps
Traffic is congesting around the Newmarket area. Photo / via Google Maps