Not every crash is physically avoidable _given a time constraint_. When you're a millisecond from impact, there's nothing you can do. One second, there exist ma

Not every crash is physically avoidable _given a time constraint_. When you're a millisecond from impact, there's nothing you can do. One second, there exist many cases where there's nothing you can do. 10 seconds before impending collision, and it's hard to imagine the case where there's no time to react in some way that avoids the accident.