Emergency services are at the scene near the intersection of Tahuna Road and drivers are urged to avoid the area if possible.
A detour via SH30, Te Teko Rd, SH2, Hydro Road and back onto SH30 is in place for eastbound traffic and vice versa for vehicles heading west.
For personalised information about driving conditions on their frequently used routes, motorists can sign up to On The Move at www.onthemove.govt.nz
For real time information on highway conditions and incidents or to report issues on the network visit www.nzta.govt.nz call 0800 4 HIGHWAYS or follow @nztawaibop on twitter.