Police have warned motorists of "significant congestion" In Westgate near the new Costco site which opened today.
The big box retailer opened this morning with queues out the door at Westgate ahead of its opening.
"Police would like to advise motorists of significant congestion around Fred Taylor Drive and Gunton Drive, Westgate.
Unless you are specifically travelling to the area, motorists are advised to take another route to get to their destination," police said.
A woman who arrived at Costco and joined the queue at lunchtime said it was taking about 40 minutes to reach the store's entrance.