Simple wire rope median barriers could prevent many serious and fatal crashes, a road safety campaigner said.
"Scientific studies show beyond doubt that many head-on collisions are easily preventable if wire rope barriers are installed on existing roads," said Clive Matthew-Wilson, editor of car review website dogandlemon.com.
Instead of installing more barriers, the Government had abandoned plans to built barriers on some of the country's most dangerous roads, he said.
The NZTA decision to cancel plans to install two-wire rope median barriers on the Kapiti coast highway "quite simply, insane", he said.
"Since the wire rope median barrier was installed on the nearby Centennial highway, most of the serious injuries and deaths stopped overnight.