Two critically injured in separate SH1 crashes in Northland, Waikato

Parts of State Highway 1 in Northland and Waikato are expected to be closed for an extended period following two serious crashes that occurred within 15 minutes of each other this morning.

A section has been closed south of Whangārei following a crash between a truck and a pedestrian. Police said it was notified of the crash at 9.34am.

"At this early stage it appears one person has been critically injured," a police spokesperson said.

Fire and Emergency NZ responded with one truck from Whangārei. The road had been closed in both directions with diversions in place at Tauroa St and South End Ave.

NZTA said motorists should avoid the area or expect delays and diversions.

"Traffic will be heavier than normal, and people are asked to take care. The closure is expected to be in place until at least mid-afternoon to allow the Serious Crash Unit to investigate," a spokesperson said.

"Northbound traffic travelling to Whangārei should follow the local road detour from Rewa Rewa Rd. Northbound through-traffic should turn left onto State Highway 15 (Otaika Valley Rd) in Otaika, then right onto State Highway 14 in Maungatapere before rejoining SH1 via Maunu Rd in Whangārei.

"Southbound traffic should take the same route in reverse."

A second serious crash has closed a section of State Highway 1 north of Tokoroa.

Police said the two-vehicle crash occurred near the intersection with Tamatea Rd at around 9.50am.

"One person involved in the two-vehicle crash is in critical condition," a police spokesperson said.

The road was expected to be closed for much of the day, they added.

Fire and Emergency NZ responded with one truck from Tokoroa. Diversions were in place at Rollett Rd and Wiltsdown Rd.

NZTA advised motorists to delay their journeys or allow extra time.

St John has been contacted for comment.