12 hours of sitting with 3 5 minutes stops is unbelievably bad for you. 12 straight hours of driving is unbelievably bad for you. None of that should happen, ever. Even if it’s your job. It’s bad for so many reasons. If you frequently subject yourself to this, you actually need to be forced to take more longer breaks, your body and mind will say thank you for it. 12 to 15.5 is hardly through the roof, it’s what, 25% increase? It honestly should be more.

That’s the magical part of population density. If a lot of people travel through the area, this area, almost by magic, develops facilities that cater to traveling people. If not a lot of people travel throuth the area, then, well, it’s not a lot of people so their experience and needs shouldn’t dictate how the rest of the world operates. The rural america from those states that nobody quite remembers the names of, in particular, is not representative even of the US as a thing, let alone the developed world.

Anywhere where people live. Which is, incidentally, where people are.

It’s so easy to install communal chargers, that no house has an excuse to not do it. It just needs to be normalised.
Here where I live, I don’t think there is a house with no ev charger at a parking space.

Alternatively, take smaller stops more often. It’s so much better to stop every 100km for like 15 minutes to walk around, get a pee break, or whatever, than to endure 4 hours of sitting in one go.