Traffic clogged on Auckland's Northwestern Motorway

Traffic is banked up across the Causeway on the Northwestern Motorway as peak hour travel lasts into the morning. Photo / NZTA

It's a long, slow crawl into the city this morning on Auckland's Northwestern Motorway after a truck fire, crash and breakdown added an extra hour to the journey.

Traffic is still heavy heading into town, extending the breakfast rush hour into the middle of the morning.

The blockages, including a truck fire at Huapai, a crash near St Lukes and a breakdown at the Lincoln Rd onramp have been cleared but have had a massive impact on the journey into the CBD.

Motorist Philip Duncan said his commute into town had ballooned from 15 to 75 minutes.

The truck caught fire at Huapai on SH16 blocking the road heading into the city just after 6am.

A truck on fire is partially blocking the eastbound lane on SH16 Huapai near Trigg Rd. Expect delays and #DriveSafe ^LC

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) June 21, 2017

Further up the motorway a crash at 7am blocked a lane after the St Lukes onramp.

AKL Travel Update: CRASH blocking lane 3 CB on the Nth Wstn Mwy after St Lukes. Expect delays ^IZ

— Time Saver Traffic (@TSTraffic) June 21, 2017

An hour later a breakdown blocked the left lane westbound at the Lincoln Rd onramp.

Update: The breakdown is now clear and all lanes are open. Traffic is free-flowing. ^LC https://t.co/GgGcVIxIns

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) June 21, 2017