Auckland motorists should expect delays after a crash is blocking a lane on the southern motorway.

Emergency services were called to a car versus truck crash at 5.17pm on State Highway one, between Market Rd and Greenlane.

A spokesman said there were no injuries but the car was blocking the far right lane, for northbound traffic.

NZ Transport Agency advised commuters to merge left to pass with care and expect delays.

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Traffic is currently very heavy citybound from Princes St, it said.