Probably arrogance. It's been many years since I've driven through fog thick enough to truly limit visibility, so light fog I might only drop my speed by 5-10MP

Probably arrogance. It's been many years since I've driven through fog thick enough to truly limit visibility, so light fog I might only drop my speed by 5-10MPH. Taillights are still visible at a safe distance in light fog. I can just about remember how easily they disappear (almost evaporate) into nothing in thick fog. Assuming the fog isn't that thick and driving through with excessive speed, it's astonishing how quickly the car in front with rear lights on full can appear out of nowhere. A combination of wanting to get to your destination on time, inexperience and overconfidence are probably the key reasons.