The Government has committed to rebuilding State Highway 1 to Kaikoura - at a cost of more than $1 billion.
Transport Minister Simon Bridges said SH1 and the rail corridor along the coastal route to the north and south of Kaikoura would be rebuilt in about 12 months.
"Since the day of the earthquake, restoring access to Kaikoura has been our number one priority. Agreeing to restore the coastal route demonstrates our ongoing commitment to getting this region back on its feet as quickly as possible," Bridges said.
"To provide certainty, the Crown will fund the work required. Exact costs are still being determined, but the current estimate is between $1.4 billion and $2 billion.
"In addition, emergency legislation passed through Parliament last week will cut through red tape, and ensure repairs to the existing route can be accelerated."
Bridges said an Order in Council was being prepared that would accelerate the rebuilding on SH1.