NZTA footage shows the long line of traffic building up on the Northern Motorway. Image / NZTA
A truck which rolled, blocking two northbound lanes on the Northern Motorway in Auckland, causing traffic to back up for nearly 20km, has now been cleared.
But several other crashes are causing elsewhere on the city's motorway network.
The truck crash occurred just before the Tristram Rd off-ramp about 4.40pm.
Traffic slowed to a crawl, creating long queues as the congestion stretched between Spaghetti Junction in the city and Greville Rd.
The traffic was particularly heavy after the Auckland Harbour Bridge in Northcote with NZTA advising motorists to avoid the area or pass the incident with care and be prepared for "significant delays".
