A breakdown on Auckland's Southwestern Motorway that caused congestion for peak-hour traffic is now clear, but the traffic drama has been replaced by a crash.

The first breakdown was partially blocking the right-hand lane on the northbound side of the motorway at Queenstown Rd.

The Transport Agency urged motorists to pass with care and expect delays back to Mangere Bridge.

However the breakdown was now clear and traffic moving normally again.

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Meanwhile, a crash blocked the right-hand lane northbound at Massey Rd.

NZTA asked motorists to merge left and pass with care.