A council spokesperson said New Zealand Transport Agency Waka Kotahi (NZTA) would contribute 53% of the estimated total project cost, with Hastings District Council funding the remaining 47%.
Hastings mayor Wendy Schollum said the roundabout would significantly improve safety at a location with a long history of serious crashes.
“Preventing even one fatal or serious injury crash at this intersection matters.
“This is about keeping people safe on a road many locals use every day, and reducing the risk of the kind of harm that stays with families and communities long after a crash happens.”
Council’s director of infrastructure Darren de Klerk said smaller bolt-on roundabouts, including rubber roundabout options, were assessed but ruled out as unsuitable for a high-volume, higher-speed intersection used by heavy vehicles.
“As well as constructing the roundabout itself, the project includes full road surface reconstruction on all approaches, heavy-vehicle-specific design features, safety improvements, drainage works, relocation of power and telecommunications services, and traffic management,” de Klerk said.
To be effective in the 80km/h area, the design includes appropriate entry angles, a large central island, and splitter islands on each approach to reduce speeds and provide safer crossing opportunities for shared path users.
Construction is due to begin in mid-January and continue through to May.
Both lanes of the road are expected to remain open for most of the construction time, with temporary speed restrictions in place.
According to national estimates, the average social cost of a fatal crash was $4.9 million, a serious injury crash $923,000, and a minor injury crash $104,000.
LDR is local body journalism co-funded by RNZ and NZ On Air.