It’s not vehicle speed that kills, it’s vehicle *momentum*. A smaller car going faster may deliver less impact than a large vehicle going slower (momentum = velocity * mass).
We already have the (table stakes) technology to apply geo-fence-based speed throttling. And this should definitely take momentum into account. So if someone decides to use a 40% larger-than-average car in cities, their speed limit should be throttled to be 40% lower-than-average. Momentum-based limits!
"So if someone decides to use a 40% larger-than-average car in cities, their speed limit should be throttled to be 40% lower-than-average. Momentum-based limits!"
But that means everyone around them is throttled to 40% lower speed limit. Best just to keep them off the road in the first place.
