State Highway 2 through the Karangahake Gorge will be closed tonight and tomorrow night.
From 8pm to 5am, a full road closure will be in place to allow for road maintenance, says the NZTA.
"Cordons will be in place between the Paeroa urban boundary and the Waihi urban boundary for essential Road Maintenance Works."
Detour route: Southern Detour: SH2 (Waihi to Tauranga), SH29, SH24, SH27 (Matamata to Tatuanui), SH26 Tatuanui to Paeroa) - and vice versa. Northern Detour: SH25 (Waihi to Hikuai), SH25A, SH26 (Kopu to Paeroa) - and vice versa.