Tow trucks were arriving at the scene at about 3.45pm, a police spokeswoman said.
"Hopefully it will be unblocked and all clear soon."
UPDATE 3:35PM Due to a #crash on #SH1 SOUTHERN MWY, the left lane remains blocked. Please pass the scene with care and expect significant delays.https://t.co/aSa9wxtrQg
— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) April 14, 2019
SH1 SOUTHERN MWY, NORTHBOUND - CRASH - 3:25PM A #crash is BLOCKING multiple lanes just after Highbrook off-ramp, please follow directions of emergency services and expect delays. ^EH pic.twitter.com/JaNzYrWbLU
— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) April 14, 2019