A decision has been made on the alternative route to the Manawatu Gorge.
NZTA have decided to go with option three, across the Ruahine Ranges and ending in Woodville.
It will cost upwards of $500m.
Construction will start in 2020 and is expected to take four years.
State Highway 3 through the gorge has been closed since April after large slips came down.
This option would provide a new road corridor across the Ruahine Range south of Saddle Road.