State Highway 39 between Ngaruawahia and Pirongia is CLOSED following a serious crash.
The NZ Transport Agency says the driver of a car has hit a power pole and there are power lines over the road.
Contractors are at the scene working to replace the power lines and the road is expected to reopen by 2pm today.
A detour via Reid Road, Old School Road and Finlayson Road is in place and traffic is light.
For personalised information about driving conditions on their frequently used routes, motorists can sign up to On The Move at www.onthemove.govt.nz(external link)
For real time information on highway conditions and incidents or to report issues on the network visit www.nzta.govt.nz(external link) call 0800 4 HIGHWAYS or follow @nztawaibop on twitter.