If you want a silly huge car you should pay silly huge fees for it. You must compensate the public for your nuisance vehicle.
("murder" is a bit an extreme reaction but the more realistic idea may be to make harsher judgements the more pointlessly large and dangerous the vehicle is)
If the average Dodge Ram causes X millimorts of deaths per year (per km? per km on suburban roads?) and every dollar spent on public healthcare (drug interventions? road safety? Fire departments?) saves Y lives, you can increase the tax by X/Y, trust the government to spend the extra revenue in the most effective way, and everyone comes out better off.
It sounds so enlightened to shuffle micromorts around. What good is it to the parents of a child killed by an unsafe vehicle that increased taxes going to healthcare will ensure that 320 elderly people can live 3 months longer?
Also, it's very rarely an "accident" with a road traffic collision - that implies that there was no fault involved with the collision and "just one of those things that happens". (I would consider an accident more like a tree suddenly falling or an undiagnosed medical condition).
Because I read comments like that and I don't.
A murder charge for a crime without intent? In the rich west? There just isn't the political will for that. A policy like that is about as serious as luxury space communism.
One of the principles of Libertarianism is equivalent compensation for damages. What is a fair compensation if someone causes death? A life for a life? Code of Hammurabi? Such laws have existed before, but there is indeed no apatite for that in modern times.
So if the government is going to be arbiter of fair compensation, the best it can do is to prevent harm from happening as much as possible. Claim that as a society we did our best to prevent the death, and assign victims and token amount of money. But this also means that not doing everything you can to prevent deaths goes against Liberatarian principles, because you allow for more unfair compensation.