Union Street/SH1 wastewater and stormwater project: overview
This project is replacing wastewater and stormwater pipes on Union Street/SH1 in Milton. Work is progressing in stages, with temporary traffic changes in place to keep everyone safe while the work is carried out.
Below is a simple overview of what has happened so far and what residents and road users can expect next.
Project progress to date
- From 11 May: A detour was introduced for southbound traffic on Union Street/SH1, with vehicles redirected via Melville Avenue and Centennial Avenue while pipe replacement work took place.
- Mid-May: The detour remained in place so work could continue as part of the four-stage project.
- 22 May update: The detour was extended to 27 May due to unexpectedly soft ground conditions and extra repair work needed near Four Square Milton and on the northbound shoulder.
- 27 May update: A proposal was put forward to temporarily reinstate two lanes of traffic for King’s Birthday weekend, subject to NZTA approval.
- 29 May update: At this stage, NZTA say it is not possible to remove the current detour as work on the highway needs to continue to make sure the road is safe and repairs are completed properly.
Current status
Work is continuing, and traffic management is being adjusted as the site conditions allow. It is likely the detour will remain in place for up to two months. We encourage people to keep children and pets clear of the worksite.
Thank you
Thank you to Milton residents, businesses and travellers for your patience while this work is carried out. We know the detour and disruption have been frustrating at times, and we appreciate your continued understanding.
If you have any questions or need help, please call 0800 801 350.
Traffic overview map
Detour route highlighted YELLOW
Lane closure highlighted RED
Usual traffic flow highlighted BLUE
Roading Notices
