Transport Minister Phil Twyford said he was very pleased to be able to deliver O2NL to Horowhenua.
"It is so important to Horowhenua.
"NZTA has evaluated the entire project and has done some redesign work. A shared pathway for cyclists and walkers will run alongside the new expressway and one of the lanes each way will be for priority traffic such as public transport, freight and cars with multiple passengers.
He acknowledged that the stretch of road between Ōtaki and Levin is the most dangerous piece of roading in the country with 49 deaths and serious crashes in five years.
"This road has been on the books a very long time, long before National came out in the last election and called it their road.