A car collision on the intersection of SH29 and Cambridge Rd is causing congestion this morning.
A police spokesperson said there were two vehicles involved.
St John had been alerted of the event but stood down. Nobody had been injured in the crash, they said.
Tow trucks had been notified to clear the area.
The New Zealand Transport Authority said the right hand turn (for vehicles travelling west) off Sh29 into Cambridge Rd was blocked.
NZTA are asking motorists to avoid the area and use alternative routes.