As I gain experience commuting by bike, I find myself getting better at identifying potentially dangerous drivers. Has anyone else noticed that one sure sign of a dodgy driver is headgear? If they're wearing a hat or a hood, they're almost always unpredictable, aggressive or inattentive; if they're wearing both, don't go anywhere near them!
Around here if I can spot that the driver is wearing a hoodie and the hood is up or a baseball cap that either is on crooked or the brim is perfectly flat, I know I have a potential driver issue coming.
In other words, young males, notorious for being the most aggressive and accident prone drivers on the road, hence higher insurance rates where allowed by law.
Also, are people riding backwards? I don't tend to see a driver until they pass me, and even then rarely get a good look at them.