[tempestn]

I was discussing the case of an avoidable rear crash. Vehicle approaching from rear, either not beginning to slow by a minimum expected distance, or slowing, but with apparently insufficient space to come to a stop. Space in front, allowing for safe acceleration. Seems logical to move out of the way, and I don't see any reason why it would increase the chances of a multi-car accident.

[mgurlitz]

Sometimes it would misjudge an avoidable crash, though. When an accident includes a vehicle in front, the middle car is oftentimes liable for following too closely. It might seem logical, but that "safe acceleration" could cause a pileup, and push it into an intersection for example.