Fuel consumption? Net total particulate emissions? Net involved fatalities (regardless of fault)? It's not like this is hard. Those are the things people care about reducing.
At best, vehicle mass is a proxy measurement for those things. But the thing is, you use a proxy measurement when the things you're trying to measure are hard to measure. That stuff is easy!
Fundamentally my point is libertarian: If we want to regulate safety, we should regulate safety and not play dumb games with weight rules that then need to be tuned for EVs or whatnot. Fine-tuned rulemaking doesn't work.
At best, vehicle mass is a proxy measurement for those things. But the thing is, you use a proxy measurement when the things you're trying to measure are hard to measure. That stuff is easy!
Fundamentally my point is libertarian: If we want to regulate safety, we should regulate safety and not play dumb games with weight rules that then need to be tuned for EVs or whatnot. Fine-tuned rulemaking doesn't work.