The key benefits of the project include:
- reducing deaths and serious injuries on the road.
- improving the connection between Greater Wellington’s major urban centres – Kāpiti and Porirua to the west and the Hutt City and Upper Hutt to the east.
- supporting economic growth by providing better access and more reliable journey times.
- building more resilience for Greater Wellington region’s transport network.
The work involves realigning curves, widening road shoulders for cyclists and vehicles wanting to pull over, installing median safety barriers, constructing two new roundabouts, a new bridge and bridge widening improvements. This map shows the improvements across the highway.
SH58 safety improvements map [JPG, 414 KB]
Construction timeline of safety improvements
Over 19,000 vehicles travel State Highway 58 (SH58) daily, but its current geometry and roadside hazards are contributing factors to many of the high severity crashes in recent years. Its 5-year crash history includes 10 serious or fatal crashes. These incidents also cause travel time reliability problems from crash related delays and closures of the road.
In recent years there have been rounds of consultation with the community and other stakeholders and this has led to expanding the scope of road safety work on SH58 to achieve greater safety outcomes than originally proposed.
In 2018 the speed limit was lowered from 100km/h to 80km/h. We’re already seeing positive results with a reduction in the speed being travelled by the fastest motorists, while the average speeds across the route have been maintained at just under 80km/h. We also addressed some of the high-risk curves west of Mt Cecil Rd, by straightening them and installing a median barrier.
Initially there was only funding available from the National Land Transport Fund for the Stage 1 safety improvements and the design and consenting for Stage 2. Following feedback from the community, we also funded some interim safety measures in the Stage 2 area. These measures included new line marking, improved lighting, electronic speed indicator devices and larger signage.
In January 2020, funding for the SH58 Stage 2 safety improvements was announced as part of the Government’s multi-billion NZ Upgrade Programme (NZUP). This estimated $59 million investment recognises the importance of road safety and the key role of SH58 in the continued growth of the Greater Wellington regions.
Phases for highway improvements
|Detailed design, lodge consent applications for Stage 1 and 2 safety improvements
|Interim safety improvements (Mount Cecil Road to Transmission Gully interchange, Pāuatahanui)
|Stage 1, Hayward’s Interchange through to Mount Cecil Road, safety improvements construction
||October 2019–mid 2021
|Stage 2 construction – Mount Cecil Road to Harris Road
|Stage 2 construction – Harris Road to Transmission Gully interchange, Pāuatahanui
Cost and funding source