Photo: Supplied/NZTA
Part of State Highway 29A is closed in Tauranga after a large tomo, or cavity, was discovered under the road.
The cavity, which is about three metres deep and filled with water, was discovered on Friday in the left-hand lane heading from Barkes Corner to Oropi Roundabout.
It looked like a small hole from the outside, but the sheer size of the cavity was revealed when NZ Transport Agency Waka Kotahi crews investigated further, acting regional manager of maintenance and operations Roger Brady said.
"As soon as we saw the size of the tomo we fully closed the road due to the potential safety risk to road users."
The cavity is about three metres deep. Photo: Supplied/NZTA
The erosion appeared to have been caused by a failed stormwater drain, he said.
The highway was closed between Barkes Corner and Oropi Road Turnabout while emergency repairs were carried out.
"SH29A is likely to remain closed here until Monday evening at the earliest, but until investigations reveal the extent of the repair, the timeframe for re-opening is really unknown at this stage.
"Once we have more information about the size of this job, we'll update the public."
The tomo, which is filled with water, is thought to have been caused by a failed stormwater drain. Photo: Supplied/NZTA
Road users should allow extra time for the detour, Brady said.
The detour for southbound traffic was left onto Cameron Road, right onto Maleme Street, right onto Oropi Road and left onto SH29A.
Northbound traffic should turn right onto Oropi Road, left onto Maleme Street, left onto Cameron Road and right onto SH29A.
Drivers were encouraged to keep an eye on https://journeys.nzta.govt.nz for up-to-date information about road works and closures.