> Drivers just don't expect cars in a straight and clear lane in a tunnel to stop at random
That's just it, why not? I always have the expectation that some unexpected can happen around me in traffic, at any time, and position myself accordingly. If I'm too close to the one in front of me so I can't handle them braking suddenly, then that's telling me I'm too close.
I've been close to a lot of accidents, but never actually in one. Being vigilant at all times when driving and taking breaks when I stop being vigilant, I'm sure have played a huge role in being able to avoid these accidents.