State Highway 1 closed after crash near Johnstones Hill Tunnel, Auckland

State Highway 1 is closed after a crash blocked lanes in both directions north of Auckland. Photo / Waka Kotahi

State Highway 1 was closed after a crash blocked lanes in both directions north of Auckland Monday evening, but delays remain.

Police said a truck travelling south crashed into a van about 4.49pm, closing the highway.

One person sustained moderate injuries and was being treated at the scene.

Waka Kotahi NZTA said the crash happened south of the Johnstones Hill Tunnel between Orewa and Puhoi.

Emergency services worked to clear the crash and reopen the road "as quickly as possible", the transport agency said.

Both northbound and southbound lanes have been blocked. The transport agency said a "lane shift" was in place, so traffic was limited to one lane each way on the northbound lanes.

Waka Kotahi is asking motorists to use the Hibiscus Coast Highway as a detour and to expect long delays.

Traffic southbound has backed up about 6km.

Meanwhile, a separate crash is blocking lanes further north on SH1 near Artillery Rd on the Brynderwyns.

Waka Kotahi said police were on-site, and asked motorists to follow their directions.

FINAL UPDATE 6:15PM
Good news - our crews and emergency services have worked to clear the crash and re-open the road as quickly as possible. SH1 is now fully open again between Orewa and Puhoi. Expect delays as congestion eases through the area. ^MF https://t.co/HQ00Hmgdvn

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) October 17, 2022

SH1 PUHOI – 5:20PM
Due to a crash #SH1 is now closed in both directions between Orewa and Puhoi. Please detour via Hibiscus Coast Hwy and expect delays. More here: https://t.co/sVaVFZmpHS. ^MF pic.twitter.com/H6bbQpJY1A

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) October 17, 2022

SH1 JOHNSTONES HILL TUNNEL - 4:55PM
A crash outside the southbound #SH1 Johnstones Hill Tunnel has currently blocked both southbound and northbound lanes. Avoid the area if possible or expect long delays. Please note a lane shift is in place, due to project works in the area. ^MF pic.twitter.com/fQMk4dl1ca

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) October 17, 2022

SH1 BRYNDERWYN - 5:40PM
A crash is blocking lanes on #SH1 near Artillery Rd on the Brynderwyns. Police are on-site, please follow their directions and expect some delays. https://t.co/QtTDt6C79Q. ^MF pic.twitter.com/iABRERAdb7

— Waka Kotahi NZTA Auckland & Northland (@WakaKotahiAkNth) October 17, 2022

More to come.