How About a Guardrail?

I've been driving roads like this for a month now. Beautiful yes, but often with no shoulder or guardrail so who can look? Driving requires a lot of concentration especially since many days were rainy. First picture shows the coast road, west coast, South Island of New Zealand. Second shows a small section of the Buller Gorge pass which is only one car wide, goes around a blind curve and has no way to let you know if anyone is coming in the opposite direction. Carved out of the rock it's a sheer drop to the river.