Especially the interactions between these factors plays an important role. Traffic safety
measures should aim to break through the concurrence of circumstances leading to an accident
in a concrete situation. If one of these influencing factors can be changed, there is a good chance
that the accident will not take place. In other words, less accidents means a safer behaviour of
the road user, safer vehicles and safer traffic infrastructure; for example through improved
education, better driver skills or more experience of the road users; better road design causing
less conflicts for the road users; safer vehicles with increased visibility or better brakes, etc.
Studies show that especially the combination and integration of these elements is important. The
safe operation of the interfaces between these elements is as important as the intrinsic safety of
the road user, vehicle and environment as such.