Increasing the roundabout to two lanes
When construction of the new roundabout commenced in March 2019, our contractors were tasked with delivering a single-lane roundabout, plus additional earthworks, foundations and culverts, to ensure the roundabout could be increased to two lanes in the future.
Towards the end of 2019, Waka Kotahi NZ Transport Agency approved additional funding to bring forward the construction of the larger dual-lane roundabout.
Increasing the Loop Road roundabout to two lanes means an additional southbound lane is required on SH1 as well as a new bridge to accommodate the additional lane. The new bridge and lane will ensure southbound traffic exiting the roundabout have a safe distance to merge back into a single lane before Portland Road.
The new bridge will be constructed to the east of the existing bridge, which will be kept for northbound traffic only. The new bridge will be constructed to our current design standards which mean it will be approximately 1.8 metres higher than the existing bridge on SH1.
The higher bridge structure means right turns into, or out of, Oaks Road will not be possible. Northbound and southbound lanes will be separated by a centre wire-rope barrier. We have constructed a safe turning area on Portland Road for Oaks Road and SH1 residents to make right turns.
Resource consents have been issued and we are aiming to get underway within the next construction season.