There are three measures of safety, all of which have their place in Dutch bicycle provision:
Actual safety – How many km you can expect to travel before you’re injured on your bike.
Subjective safety – Are you near fast moving traffic ? Is it easy to make a turn across traffic ? Do you have to cycle “fast” in order to keep up ?
Social safety – Is there a mugger around that blind corner ? Will I be attacked in the street if I cycle ?
via David Hembrow