A crash on the Southern Motorway was blocking the right southbound lane just after the Penrose Rd overbridge, but has been pushed clear of lanes.
Motorists were advised to expect delays as congestion eases through the area.
Traffic is reportedly heavy southbound leaving the city through to Greenlane, then busy to Mt Wellington.
Northbound is heavy from Mt Wellington through to Greenlane then busy to the city.
An earlier crash on the Northern Motorway is now clear of lanes, but was causing delays southbound between Greville Rd and Sunnynook.
Police said they received several reports that a small truck had crashed about 5.30pm.
"However it appears the driver attempted a turn and the trailer overturned, so there was no real crash. It was blocking the city-bound lane. There were no injuries," a spokeswoman said.
Traffic remains heavy southbound from Rosedale through to just past Constellation Dr on-ramp, and northbound from Stafford Rd through to Upper Harbour Highway.
On the Northwestern Motorway there are queues to SH1 interchanges southbound, then busy traffic along the causeway through to Te Atatu.
The Southwestern Motorway has queues for SH1 interchange, and northbound is busy from Massey Rd through to Walmsley Rd.
