Partial closures are also planned overnight on Sunday and Monday nights, 2 and 3 August.
Over the next few months, the New Zealand Transport Agency is planning a number of partial and full closures of State Highway 1 between Ngauranga and the Terrace Tunnel.
These closures – part of the Smart Motorway project – are primarily to install the large new gantries that will provide variable speed instructions to make peak-hour travel times more predictable.
The closures will mostly be at night between 10pm and 6am. The exception is the one coming up on Saturday 1 August.
State Highway 1 will be closed in both directions from 10pm between Thorndon and Ngauranga. The southbound closure – to install two overhead gantries that will house fixed directional signs – will be reopened by 6am on Sunday 2 August. However, the northbound direction will remain closed until approximately 10am.
The 12-hour northbound closure is required to reduce vibration on the Thorndon overbridge while the concrete, which is being used to ‘stitch’ the old off-ramp at Kaiwharawhara to the main Thorndon overbridge structure, cures.
You’ll still be able to get into and out of Wellington at all times, but you’ll need to factor in extra time to get where you are going and follow the detours. Watch for details on the electronic message boards on the highway and the extra mobile signs that will be in key spots around town.
Sunday 2 August night closure
The SH2 off-ramp at Ngauranga will be closed from 10pm Sunday to 6am Monday.
Monday 3 August night closure
All southbound lanes on the Ngauranga flyover at the bottom of Ngauranga Gorge will be closed from 10pm on Monday night till 6am on Tuesday. Traffic will be diverted onto the Hutt Road instead.
Further closures are planned in September and maybe October but the dates are yet to be confirmed.
For more about the closures and to see detour maps, go to New Zealand Transport Agency
To find out more about the Smart Motorway project, visit the information centre in the Johnsonville Mall or check the Smart Motorway project page