Part of State Highway 1 Desert Road is to have two full closures and will be down to one lane for almost three months while the deck is replaced on Waihohonu Stream Bridge.
The bridge was damaged by a truck crash in July 2017.
The repair work is expected to start on Thursday and should be completed in April. During this time road users can expect the bridge to be down to one lane, with some short closures of around five minutes. There will be a 30km/h limit in place.
The full closures are projected to take place on February 26 and March 14, weather permitting. Each closure is expected be from 7am for around 36 hours. The alternative route is State Highway 46, 47, 4, and 49.
This route is not suitable for vehicles over 44 tonnes, apart from 50MAX which is permitted. High productivity motor vehicles can use the SH3 and SH3A route between Hamilton and Bulls.