Three young overseas visitors may owe their lives to a guardrail put in at Shines Hill, near Charleston, just hours before they crashed.
The men, believed to be Chinese, were travelling south to Greymouth last night when the driver lost control of the vehicle on gravel at roadworks at the base of the hill.
He told police this morningthat he had not seen the roadworks warning signs so failed to slow down.
He braked but lost control of the rental car which then spun, smashing into the guardrail and extensively damaging the front and rear.
There is no cellphone coverage in the area and no nearby houses so the shaken trio stayed in the car overnight.