speed limit is a great choice for an example here, since damage via motor vehicle collision is exponentially related to speed. ie the difference between potenti

speed limit is a great choice for an example here, since damage via motor vehicle collision is exponentially related to speed. ie the difference between potential for injury/death is considerable higher between the 40-50 increase than the 50-60 increase. When I drive my car, I'm not worried about my ability. I'm worried about other's ability. Are they texting? Are they drunk? etc. If everyone is capped at 50mph, then the potential for damage is much lower than if everyone was capped at 60mph. It's not about personal safety or whether your vehicle can safely operate at higher speeds under ideal conditions. It's about the potential to injure others (or others to injure you) if those ideal conditions aren't met for some reason (user error or extraneous conditions) and our ability to account for when those ideal conditions aren't met.