A serious crash has forced the closure of part of Auckland's busy Karangahape Rd.
The westbound lanes of the road between Pitt St and Howe St are closed.
Auckland Transport is advising motorists to avoid the area or follow the directions of emergency services.
Meanwhile, a large truck is blocking part of the Northern Motorway heading into downtown Auckland and motorists are being told to find another route.
Transport authorities said about 12.30pm the truck was blocking the left lane, citybound, of the State Highway 1 Northern Motorway near the Silverdale on-ramp.
The NZ Transport Agency said: "Avoid this route or merge with care and expect delays.''
Images from NZTA cameras show long lines of vehicles backing up towards Silverdale.
SH1 NORTHERN MWY, SOUTHBOUND - BREAKDOWN - 12:30PM— NZTA Akld & Nthlnd (@NZTAAkl) June 13, 2018
A truck breakdown is blocking the left lane citybound at the end of the Silverdale on-ramp. Avoid this route or merge with care & expect delays. ^TP pic.twitter.com/F0vdjNVR2s
Earlier today a crash on the Southern Motorway resulted in delays in and around the Manukau area.
The accident happened about 11.45am near the southbound lane just before the Orams Rd overbridge.
Authorities cleared the area just after midday, but motorists were told to allow for extra time due to congestion.
SH1 SOUTHERN MWY - CRASH - 11.45AM— NZTA Akld & Nthlnd (@NZTAAkl) June 12, 2018
A crash is blocking the southbound left lane just prior to the Orams Road over-bridge. Please pass the scene with care and expect delays. ^MF pic.twitter.com/Qz81BcI897