New Arterial Road - West Kaiapoi

A new arterial road is to be constructed in west Kaiapoi to cater for ongoing development of land around the western side of Kaiapoi and will provide a key link to West Rangiora and Southbrook.

About the Project

A new arterial road is to be constructed in west Kaiapoi to cater for ongoing development of land around the western side of Kaiapoi and will provide a key link to West Rangiora and Southbrook. The project is underway and a completion date is set for late February 2018. The completion date is dependent upon the two bridges being completed on time.

The road will extend from the Ohoka Road off-ramp and will curve around onto Butchers Road before joining back onto Island Road near Mill Road. The purpose of the road is to direct the through traffic away from the new residential area of Silverstream. The road will address safety issues at the intersection at Ohoka Road/Island Road and Cosgrove Road. Improvements will be made at intersections along the new arterial road. The new road will be two lane (one in each direction) and will involve the construction of two new bridges along the alignment.

In the future Island Road between Mill Road and Adderley Terrace will be closed to through traffic and the New Arterial Road will form the main link through to Kaiapoi. While Adderley Terrace will still provide an alternate route through to Kaiapoi, traffic will only be able to use this approaching from the south east, as Island Road will be closed between Adderley Terrace and Mill Road later this year. Once that happens, access to Adderley Terrace from the north will no longer be available. Refer to the map to view the future road layout.

A tender has been awarded to HEB Construction Ltd for the physical works. Work began on site in January 2017. Hours of work are 7.30 am to 6 pm, Monday to Saturday. Some night work will be undertaken to help reduce the impact on road users. Residents will be notified in advance of night work being undertaken.

Traffic Impacts

  • Access to properties will be maintained during the work
  • If any access restrictions are required we will notify you in advance
  • Temporary traffic management will be in place during the work
  • Some aspects of the work may be undertaken as night work to reduce the impact to traffic. Advance notification will be provided.

Project Updates

Project Update as at 27 July 2017

Work completed

Over the last week HEB has continued to make good progress on the new road, this is despite significant rainfall.

The hollow core beams which form the bridge deck for the Ohoka Stream Bridge has been completed, and is not awaiting installation of the concrete barriers for the bridge, pouring of the topping slab, and final surfacing of the bridge.

27072017 - NAR - Bridge 

Photo – New bridge over the Ohoka Stream

 Now that the placement of the beams at the Ohoka Bridge is complete, the crane has shifted to the location for the new bridge over the Silverstream (Kaiapoi River).

27022017 - NAR - Abutments 

Photo – Abutments for the New Bridge over the Kaiapoi River.

27072017 - NAR - Crane 

Photo – 85 ton crane moving into position at the Kaiapoi River

As well as the two bridges, HEB have started work on the new box culverts under the New Arterial Road, these box culverts are part of the strategy to help deal with flooding in the area.

27072017 - NAR - Culverts1 

Photo – Preparation for the Box Culverts

27072017 - NAR - Culverts2 

Photo – Box Culverts being installed

27072017 - NAR - Culvert3 

Photo – Box Culverts being installed

Upcoming Work for next fortnight 

HEB will continue with both the installation of bridge beams for the Kaiapoi River (Silverstream), as well as the completion of the box culverts.  Once the culverts are installed, HEB will be able to continue working on the section of new road from the Culverts to the Ohoka Stream Bridge.

As well as this HEB will continue with the earthworks by the Mill Road intersection, and are hoping to start filling on the northern side of the intersection, along the new road alignment.  

Proposed Speed Limit for the New Arterial Road

 As a reminder, the consultation process for the proposed speed limit for the New Arterial Road, Ohoka Road, Island Road and Adderley Terrace is still open.

It is proposed to put in place a 50km/h speed limit from Ohoka Road across the overbridge and through the Island Road intersection, a 60km/h speed limit along the new arterial road to the end of the houses on Butchers Road, then an 80km/h speed limit through to the west side of the Skewbridge Road bridge.

The proposal includes changing the speed limit on Island Road from Cosgrove Road past Adderley Terrace to 50km/h as this area is now predominately urban in nature and a temporary 50km/h speed limit is currently in place.

To be consistent with this speed limit it is proposed to change the speed limit on Adderley Terrace to 50km/h, where the speed limit is currently 70km/h.

This consultation process will be open for public feedback until 5pm on Friday 11th August. Further information is available on Council’s Let’s Talk webpage: