This was not premeditated murder, they did not intend to kill, rather it is a death due to recklessness, it's a death due to them not understanding the possible consequences of their actions. I'm all in favour of tougher punishment when someone's driving has caused death or injury but I think we need to consider intent. There's a difference between someone being reckless and someone deliberately using a vehicle as a weapon.
I agree there was no intent to kill someone, but to say the death was caused by "them not understanding the possible consequences of their action" is a little bit of a leap isn't it? Doesn't every adult know that hitting someone at over 100mph will kill them? I don't remember being in much doubt about it, and a srraw poll round the office suggests neither have my colleagues.