The better the rules are observed, the more predictable the actions of other users are, then the safer threads will be
Safer threads?
But I think I know what you mean. Taking a small example of this, it's why it's so important for cycle tracks to cross roads at right-angles, which can mean having the track a car length away from the carriageway it shadows, at least near a side road junction, rather than the common stupid TRL-supported English layout of having the cycle track leave from a shallow-radius corner and trust turning motorists to obey the rules. If the track crosses one car length into the side road and the side road entrance has a tight-radius corner entry that requires turning motorists to slow, then the crossing traffic can see each other coming, look each other in the face, make a better guess at whether the other party is a homicidal/suicidal nobber and the motorist will have to decide to attempt to kill something that's obviously a human with a face rather than an anonymous back of a head on a bike.
But it's disappointingly difficult to get highways designers to put in the necessary gentle carriageway (ideally) or cycle track curves so they cross at right-angles. Most seem scared of leaving any grass between carriageway and track and I don't understand why - even when they squeeze tracks up next to the road, there's still verge outside that has to be mowed and so on. Around junctions, a bit of empty space for all the street furniture (sign posts, lamp posts, traffic light control cabinets, ...) which too often steal cycle track width seems like a good thing.