You mentioned in a previous question you look at the drivers "Vibes" while driving. I'm assuming you mean posture, and comfort in the car? What conclusions do you typically draw from this observation?
It's difficult to quantify - that's why I had to resort to a vague term like vibe. I think it would be a combination of how relaxed a driver looks, how determined, how accurate... and I gues you pick tose up from body language.
