Commuter crawl: Traffic backs up 20km after truck rolls on Auckland's Northern Motorway

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".

SH1 NORTHERN MWY, NORTHBOUND - TRUCK ROLL - 4:40PM
A truck roll has BLOCKED two lanes northbound just before the Tristram Road off-ramp. Please pass the incident with care and be prepared for significant delays. Avoid the area if possible. ^MF pic.twitter.com/LBzobFNKHn

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) May 6, 2019

The truck has now been cleared of lanes and traffic is easing between Spaghetti Junction and Greville Rd.

However a crash is blocking the right west-bound lane on the North Western Motorway, causing delays to Bond St.

And south-bound traffic is slow between Newmarket and Greenlane following a crash that has now been cleared just after the Greenlane on-ramp.

Meanwhile, firefighters are working to extract a person from a crashed car near Kaitaia.

Emergency services were called to the two-car crash about 5.15 this evening.

They collided on State Highway 1 near Fairburn Rd, about 8km east of Kaitaia in the Far North.

It is understood one person is trapped and there are serious injuries. A helicopter is on its way.

A fire crew is at the scene with rescue gear.

The road is closed between Takahue Rd and Ruaroa Rd.

Motorists are advised to expect delays or to avoid the area.