The New Zealand Transport Agency says repairs to the Thames Coast Road/State Highway 25 are in full swing, with the focus on prioritising sites and minimising inconvenience to motorists and residents.

"Repair work is progressing well," says the NZTA in their latest update.

"The sites along SH25 have been prioritised with safety and risk of further damage the key criteria.

"Anyone driving this road should expect delays with stop/go control and speed restrictions at various sites.”

About 1700 tonnes of rock a day are being brought in by heavy vehicles to protect the road from further erosion.

"This is necessary to rebuild the road surface and provide protection with another king tide due at the start of February.”

NZTA's contractor is laying dust suppression seals on areas with a temporary metal surface until the sea protection walls are complete. Once this is done, permanent seal will be put down.

Vehicles of more than five tonnes are not permitted on SH25 between Te Puru and Manaia, to avoid further damage to vulnerable sections of the road.

These vehicles can take the alternative route via SH25A from Kopu and SH25 on the eastern side of the Coromandel.