Traffic is backed up trying to get on to the Auckland Harbour Bridge while the Auckland Marathon takes place this morning.
An NZ Transport Agency spokesman said there were queues at 9.15am in southbound lanes between Northcote Rd and Esmonde Rd as traffic was reduced from four lanes to two, clearing two lanes on the left for the marathon.
NZTA cameras show long queues of traffic trying to get on to the motorway at Esmonde Rd, where only one lane is available, and queues building at Northcote Rd.
But they show traffic apparently flowing smoothly at Onewa Rd, where the motorway on-ramp is closed.