The NZTA is warning of significant delays for those travelling towards Hutt Valley.
A second crash is blocking the centre and right northbound lanes on SH1 before the Aotea Quay onramp.
CRASH: #SH1 Urban Motorway BLOCKING the centre and right northbound lanes prior to the Aotea Quay on-ramp. Please use the left lane ^MN pic.twitter.com/GhpSPkEKWj