← Back to context

Comment by profitnot

7 years ago

It's more than a belief... the statistics bear it out. "The lowest 2015 death rate by vehicle type is for very large SUVs: 13 deaths per million registered vehicles. The highest is for mini cars: 64 deaths per million registered vehicles." https://www.edmunds.com/car-safety/are-smaller-cars-as-safe-...

That could just mean SUV drivers drive less, or a myriad of other things. PG posted on Twitter a while back a study that showed SUVs were _less_ safe (per mile driven? I think).

  • This is a very simple matter of physics. Do you know what typically kills in a car crash? Extreme G-forces generated by near instantaneous deceleration. Big, heavy things have to expend more energy to decelerate, so they tend to do so at a relatively slower rate. Small things can be stopped very quickly. Therefore, someone in a big, heavy SUV is going to have much higher chances of survival than someone in a Mini.

  • It means that F=ma - the bigger you are, the safer you are. The driver of a small 2 seater car is going to be worse off than a huge semi if they both collide.

    • What you're talking about is "which is safer in a collision", which is an entirely different question from "which car is safer per mile to drive?"

  • Would really have to be a myriad of other things if that’s supposed to explain a 5x difference without the obvious reason for it.

    • What's the reason? That's it's bigger? But what if bigger cars crash more often? So yes, it does have to be thought about with clarity.