Waka Kotahi says a speed limit of 50km/h is in place while road workers are completing the work.
Work on the roundabout will start early in the New Year on the seaward side of SH51 and involving realignment of the road to make more space between the intersection and the railway crossing, making it safer for queued vehicles.
There will also be a new “shared path” across SH51.
Waka Kotahi says that before work begins, motorists will see protection barriers around some of the Norfolk pines alongside the road, and the agency is working with a specialist arborist to make sure these trees aren’t affected by the work.
During construction, the carpark in the beach domain about one kilometre north of the intersection will be closed to allow workers to store their equipment off the road.
The work is part of an estimated $20 million in SH51 safety improvements between Napier and Hastings.