Mayhem on Auckland motorways during rush hour

The crash was blocking the left lane Airport-bound on George Bolt Memorial Dr. Photo / NZTA

There has been mayhem on Auckland's motorways during peak hour this evening.

A strip of bark caught fire on the Northwestern Motorway after someone allegedly threw a firework.

Northern fire communications shift manager Jaron Phillips said multiple people called 111 around 5.20pm to report the blaze, and one caller said they saw it start when a motorist threw a lit firework out their car window.

And a crash that had been blocking a lane en route to Auckland Airport has caused major delays.

NZTA said the crash blocked the left lane, airport bound, on George Bolt Memorial Drive.

Update: The crash is now clear. Expect long delays to @AKL_Airport from the Sth Wstn Mwy as traffic eases ^LC https://t.co/ydnfMWKIBh

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) November 4, 2016

The crash was cleared but delays were still expected.

A crash is blocking left lane Airport bound on George Bolt Memorial Dr (SH20A) prior to Montgomerie Rd. Expect delays to @AKL_Airport ^LC pic.twitter.com/WSuvU7wnCl

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) November 4, 2016

"Expect long delays to @AKL_Airport from the Sth Wstn Mwy as traffic eases," NZTA tweeted.