Crews will work from 6.30am to 5pm each day. During these work hours, northbound traffic will be detoured via Rawhiti St, Queen St, Allan St and on to Cole St before rejoining SH2.
A temporary speed limit of 30km/h will be in place for southbound traffic near the worksite.
Outside of work hours, SH2 will be open with a reduced speed limit in place.
A one-way daytime closure allows crews to complete the work as efficiently and safely as possible while keeping traffic moving, and minimising ongoing disruption and long delay times.
Access remains for residents and businesses, while northbound road users are advised to follow the detour to reach their destination.
The detour is expected to add less than five minutes to journey times.