As part of this, I've looked at our Highway Code to work out how it could be adapted for a magical world and then added in further ideas given traffic isn't just confined to the roads in my Fairy Kingdom. Just how do you stop all those witches' broomsticks crashing into each other at rush hour (in their case, this would almost certainly be midnight!)?
So perhaps taking something which is an everyday item for us, such as the Highway Code, and working out what your world would have in its place is a way forward for bringing your settings to life in your own imagination. I do know that if I don't believe in what I'm writing, nobody else will! And for the story to work, its setting has got to seem plausible, as if it could happen in some universe somewhere.