'Sustainable Safety' is the Dutch principle of design which makes roads and streets easy to use, self-explanatory and safe by default, preventing crashes from occurring. A better English expression is 'Intrinsic Safety'.
It consists of five core principles:
- ‘Single function’ roads (monofunctionality)
- hom*ogeneity of mass, speed and direction
- Instantly recognisable road design (predictability)
- Forgiving environments
- State awareness
Read more -http://www.cycling-embassy.org.uk/blog/2014/03/26/sustainable-safety-duurzaam-veilig