And you came out alive from all those collisions, Chief Chaos. If they had happened when either or both of the vehicles was travelling at high speed you very likely wouldn't. The speed might not cause the accident - though it is likely to mean significantly less time to avoid it - but it sure as hell makes a difference to the amount of damage caused.

I'd like to see greatly improved speedometers, with audible warning signals when we are going over the limit, so we wouldn't need to take our eyes off the road to check, and we'd have no way of saying we hadn't realised we were going too fast. (Though anyone who can't know pretty well what speed they are doing, without looking at the clock, shouldn't really be driving.)