Southbound traffic through central Waipukurau will be detoured while work continues on the construction of a roundabout at the SH2, Ruataniwha St and Herbert St intersection.
However, the site will remain open to all other traffic but under controlled conditions.
A New Zealand Transport Agency spokesperson said motorists were advised to avoid travelling through the site if possible and that delays could be expected.
On SH2 north minor maintenance work is under way between Whirinaki and Putorino and in the Morere area with only "very minor" delays expected.
Motorists can also expect minor delays as guardrail installation takes place at the Mohaka Rail Viaduct near Raupunga. Guardrail installation is also being carried out on the Tutaekuri River Bridge between Awatoto and Clive.