There is no reason that certain stretches of US roadways should have speed limits. We could be just like Germany. The Autobahn isn't continuously unlimited speed; only certain sections are. Some as short as 5 km.
Many states used to have no speed limits.
I remember when NV had no speed limit. Reasonable and prudent for the weather and traffic. The 55 mph speed limit killed that and it never recovered although I think MT had like a $5 fine for a time until the feds cracked down threatening to take away money. That was then, this is now. You will never see R&P proliferate again.
First, perhaps a German member here can explain, but I don't think getting a license is as simple as here.
Second, I think the speeding fines are much greater and the enforcement much stronger in the sense they are not going to give you 55 +9 (9 mph leeway) but a ticket for a few MPH over the limit, at least I've read reports of people saying they got tickets in the mail for small numbers over the limits.
Third, Drinking. Back when the law of the some states was R&P DUI or DWI was considered in many locations like running a stop light with .15 as the magic number. Today, its .08 and taken VERY seriously. Thank MADD. Its now a big deal. Imagine now drinking with no speed limit.
Fourth, equipment. Take your tires. You know they are good for as fast as your Porsche can go. Is everyone's? Did people care about that in 1965? How about today? They might run with retreaded bias ply tires and not care a bit. Now take someone today, not want to pay for whatever rated tire they need, and slap on the cheapest tires. Take patches. Once the tire is patched, it loses its speed rating. You think people will care?
And last, people. US safety mandates have saved lives. Cars are MUCH safer. Are people? The key figure for highway deaths is by VMT.
2014 it was at its lowest and since been going up. Why? Its not because of driving more. Thats why you look at VMT and not total deaths. It could be lesser enforcement of seatbelt laws of drunk driving laws. Maybe its distracted driving. The bottom line is that it was rising, for whatever reason, despite safer cars. I see people talking on phones every week, all the time, completely ignore the law. People do whatever they want. Now imagine them doing that at 120. And doing them in junk cars or crap tires, and their face in their phones. Good plan - not. It just won't happen. You think maybe the MADD success has been pretty good that last two decades? US speed limits will never go up to R&P more than one or two states, if that. The good old days are gone forever. You can't go home.
BTW, I remember thinking - I CANNOT wait to drive in Montana, parts of northern Utah, and the best place of all, Nevada up across the desert. Its not like that video on the autobahn. There was NOTHING there. No cars, no people, nothing but sand or scrub brush. It was utterly boring. You couldn't even tell how fast you were going because there is nothing to gauge your speed against. If you live east of the Mississippi or near any big city and its suburbs, then go out into the boondocks, its is pretty interesting, straight ribbon of road, two lane US highway to nowhere, and utterly boring to drive.
Now sure, give some 20 something kid that opportunity with their cellphones today. Its not going to happen. The safety advocates would scream over it.