I spent a few days in Singapore, long ago. I felt slightly anxious, but mostly because I wasn't familiar with the rules. I'm confident that, if I spent a year or two there, I would quickly become far less anxious than in other places--because the rules are so clear and consistently enforced. The less of a judgement call is involved, the less there is to be uncertain about.

Think about it: Is it better to have a posted speed limit of 65mph and a real speed limit of 75mph, and you just have to learn from experience where the real limit is? Or is it better to post 75mph and fine any driver as soon as they exceed it?