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For live traffic updates, travel times, traffic cameras, incident and roadworks information, visit the Wellington Journey planner page: www.journeys.nzta.govt.nz/wellington(external link)

SH1 Porirua – Linden

Transmission Gully progress on SH1 Porirua – Linden is ramping up again, and this time our focus is on building bridges. 

Throughout March and April, we will lift and place the bridge beams across the SH1 connection to Kenepuru Drive in Porirua, the northbound flyover connection on to Transmission Gully and the middle section of the new bridge over Collins Avenue.

To ensure the safety of our road users and our staff, this work will be carried out at night with an extensive traffic management plan in place.

We will regularly implement either a “contra flow”, a double right lane closure or a single lane closure. On four evenings between Monday 11 March and Thursday 24 April we may divert night time traffic in one direction only through Tawa.

Traffic management and lane layout during the day will remain as it currently is – two lanes in each direction with a speed limit of 70km/hr.

The timeline for the works and traffic management is as follows:

DateActivityTraffic management
4–7 March SH1 northbound flyover connection on to Transmission Gully
Preparation works
4–7 March – southbound contra flow.
1014 March SH1 northbound flyover connection on to Transmission Gully
Lift and place northbound bridge beams
1013 March – southbound contra flow.
14 March – right lane closures in both directions. Between 11pm and 1.30am traffic will be held intermittently for 15 minutes.
16–21 March SH1 northbound flyover connection on to Transmission Gully
Lift and place southbound bridge beams
16–20 March – northbound contra flow.
21 March – right lane closures in both directions. Between 11pm and 1.30am traffic will be held intermittently for 15 minutes.
22 March – northbound contra flow.
24–28 March SH1 northbound flyover connection on to Transmission Gully
Lift and place southbound bridge beams
24–26 March – southbound left lane closure.
27–28 March – northbound contra flow. Collins Avenue closure.
31 March–4 April SH1 Collins Avenue overbridge
Lift and place beams for Collins Avenue Bridge
31 March – right lane closures in both directions.
1–2 April  southbound contra flow.
Between 11pm and 1.30am traffic will be held intermittently for 15 minutes.
Collins Avenue closed from 9pm to 4am.
3-4 April  northbound contra flow.
7–9 April Demobilise crane to prepare to move 7–9 April – northbound contra flow.
10–17 April SH1 connection to Kenepuru Drive
Preparation works
10–11 April – left lane closure in both directions.
14–16 April – southbound contra flow.
17 April – left lane closure in both directions.
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