Agency project manager John McCarthy said that during peak morning traffic using the Maungatapu and Hairini roundabouts to access Turret Road were causing queues in both directions on the state highway.
"Our traffic analysis suggests that changing the route for city-bound traffic in the morning peak coming from SH29A Te Maunga/Baypark should result in a more efficient journey for all. However, before we make any permanent decisions we need to trial this," he said.
He said the council and agency would be monitoring traffic times and traffic counts during the trial.
"With any changes to the network, it often takes time for drivers to understand that a new route may be a more efficient option. A good example of this is Ohauiti traffic travelling home through the underpass and turning right up to Ohauiti Road."
Drivers using the roundabout from Tauriko direction will continue as usual.
How to access Turret Rd
SH29A Te Maunga to city via Turret Road
Remain on SH29A (a left turn at the Maungatapu roundabout) then turn left at the Hairini roundabout onto Welcome Bay Road, then left onto Welcome Bay Link Road to travel through the underpass.
SH29A Te Maunga to Maungatapu Road
Traffic from SH29A Te Maunga wanting to access Maungatapu Road will have to use the Taipari Street off-ramp.
Maungatapu Road to city via Turret Road
Access SH29A, turn left at the Hairini roundabout onto Welcome Bay Road, then left onto Welcome Bay Link Road to travel through the underpass.
City-bound traffic from Ohauiti Road
SH29A from Tauriko and Ohauiti Road traffic can still use the Turret Road on-ramp at the Maungatapu roundabout.
