IIRC the EU is trying to mandate breathalyzers in all vehicles. I think they're working towards GPS based speed limitation being a standard thing too. OTOH the

IIRC the EU is trying to mandate breathalyzers in all vehicles. I think they're working towards GPS based speed limitation being a standard thing too. OTOH the US hasn't tried to do that yet... Fun to think about why. On one hand there's the additional cost to consumers as well as overall complexity in design (how do you make that not look like ass?) On the other hand, I'm betting that given the US justice system, at least one lobbying group would prefer more fines and/or the cost of filling up a jail cell vs preventing the action in the first place. As far as general speed limiters... IDK I'd like to be able to outrun a tornado. Also I'm guessing some car makers wouldn't like that they cannot truly market a 'top speed' of a vehicle, then you've got the track day folks who know their business would be hurt by govt-mandated speed limiters on road vehicles.