A full night closure of State Highway 1 northbound is planned at Transmission Gully as part of ongoing construction of the Mackays Commercial Vehicle Safety Centre (CVSC).

On Monday, 20 April (9 pm – 4:30 am), contractors will install a gantry that will provide electronic messaging for heavy vehicle compliance and safety operations once the CVSC is operational.

While this is underway, the northbound lanes through State Highway 1 Transmission Gully will have to be closed to traffic to allow the gantry to be safely lifted into place.

The work has been scheduled overnight to minimise disruption when traffic volumes are lower. Some delays should still be expected while traffic is diverted.

All work is weather dependent and cannot take place in unsuitable conditions, such as high winds. If required, the work may be rescheduled.

Drivers are encouraged to plan ahead, follow temporary traffic management, and allow extra time for their journeys.

Works schedule and detour route

Monday, 20 April, 9 pm to 4:30 am

• SH1 CLOSED to northbound traffic near the SH59 Paekākāriki interchange
• Northbound traffic should exit SH1 and detour via SH59
• Vehicles can rejoin SH1 at the Mackays interchange

More information

• CVSCs allow police to conduct thorough checks on heavy vehicles, including weight, road user charges compliance, and driver impairment.
• Once complete, the centre will use weigh-in-motion scales and advanced screening technology to identify noncompliant vehicles while keeping compliant freight operators moving efficiently.
• The Commercial Vehicle Safety Programme (CVSP)(external link)
• Mackays Crossing commercial vehicle safety centre (CVSC) (external link)