North Shore drivers are advised to expect big changes to how they travel through Constellation Interchange as the new SH1 to SH18 link is now open.
This is a significant change to how people move around the area, as part of work for the Northern Corridor Improvements project. The biggest change is that people coming from the north on SH1 and wanting to head west on SH18 will now travel on the new link and no longer need to leave SH1 at Constellation Drive to join SH18. View the map below to see the new lane layout which is in place.
View larger/downloadable map [PDF, 587 KB]
Frequently asked questions
How will this change my journey if I travel from the north and want to head west (Hobsonville, Greenhithe and surrounding areas)?
Drivers will be able to continue their journey on the state highway network by using the new SH1 to SH18 direct link. You will not need to leave the motorway at Constellation Drive to connect with State Highway 18.
How will this change my journey if I travel from the north and want to head to the bays?
Drivers who want to travel to Constellation Drive, the East Coast Bays or those who choose to travel south towards the city via SH1 will continue using their current route.
What is the speed limit on the new SH1 to SH18 link?
An 80kmh speed limit will be in place on the link and while travelling through the underpass, similar to travel through other underpasses or tunnels across the Auckland state highway network.
For more information, contact the project team:
