The intersection in the Tesla crash is pretty sub par by US standards. Most highway off ramps are as you described. In space restricted areas we tend to use tons of reflectors then water/sand barrels or metal crumple barriers instead of gently rising barriers and a grass infield.
In basically all cases where there's a lot of pavement that isn't a lane there's diagonal lines of some sort that make it very clear that there isn't a lane there. A good chunk of the time there's a rumble strip of some sort.
In rural areas there's less signage, reflectors and barriers but the infield is usually grass, dirt or swampy depending on local climate.
I wouldn't think wrong, but it seems to imply "AVs need great roads or bad roads, on mediocre roads they might kill you for no obvious reason, gee, too bad."
Such "pretends to work but actually doesn't", IMNSHO, would be far worse than "doesn't work there at all"
Granted my experience is my own and shaped by the areas I've lived in, but I'd say the crash barrier is pretty standard by US standards.
A few reflectors, a crumple barrier or some barrels and you've got a highway divider start! Certainly not as lengthy or as well marked as the Dutch example. This one I used to drive by in KC almost daily looks similar to the Tesla accident one (granted, this example does have some friendly arrows in the gore): https://www.google.com/maps/@39.0387093,-94.6774548,3a,75y,1...
In basically all cases where there's a lot of pavement that isn't a lane there's diagonal lines of some sort that make it very clear that there isn't a lane there. A good chunk of the time there's a rumble strip of some sort.
In rural areas there's less signage, reflectors and barriers but the infield is usually grass, dirt or swampy depending on local climate.
Edit: and I'm wrong because why?