But he encouraged people to plan ahead, allow extra time for their journeys and consider delaying unnecessary travel where possible.
"These summer works are part of the biggest maintenance programme the Transport Agency has undertaken for the last decade," he said.
"We appreciate it can be frustrating for road users and local residents, but these important works help improve the road, increase safety and make everyone's journeys more enjoyable."
Motorists travelling from Waihi
Take State Highway 2 from Waihī to Paeroa, State Highway 26 from Paeroa to Kopu, State Highway 25A from Kopu to Hikuai and State Highway 25 from Hikuai to Whiritoa.
Motorists travelling from Whiritoa
Take the same route in the reverse direction.
The detour is expected to add about one hour and 20 minutes to the journey.
Motorists travelling from Tairua
State Highway 25 to Hikuai, State Highway 25A from Hikuai to Kopu, State Highway 26 from Kopu to Paeroa, State Highway 2 from Paeroa to Waihī.
Motorists travelling from Waihi to Tairua
The same route in the reverse direction.
This detour is expected to add about 12 minutes to the journey.