[TheRealPomax]

Safer for... who? The 500 miles of mostly empty highway through no-man's land between two population centers? The US, unlike Europe, is mostly empty. You can drive for 5 hours and not just still be in the same state, you're still on the same road.

The only type of road where a regulator would make sense is the kind of road where in the US a regulator makes no sense. Every other type of road already has speed limits at or below what a regulator would be set to.

[eddd-ddde]

Safer for the driver?

[AnthonyMouse]

But then what do you need laws for? The driver already has the incentive to balance their own safety against their other interests. Laws are only needed to prevent someone from imposing an externality on an unconsenting third party.

[TheRealPomax]

Not seeing that one without a lot of words - what highway situation are you thinking of where the driver's safe enough at 50 but not at 70?

(Bearing in mind that US highways are radically different from Europe's)

[eddd-ddde]

I'm not too familiar with US or European highways.

What I am familiar with is lots of curves, inclines, declines. The kind of road where a loaded truck going the limit easily flips into the cliff to the side on the slightest error.

[TheRealPomax]

See, that's a little bit of a problem if you're trying to make a point about why US cargo trucks should have speed limiters then, because: none of those things apply to US highways.

US highways are (by design) very straight, very flat, and very long. And on the rare occasion they're not, there are already speed limits in place.