> shall turn off the roadway wherever sufficient area for a safe turn-out exists, in order to permit the vehicles following to proceed

I'd love to do that. Unfortunately, even at a slow speed, it can be _challenging_ (to say the least) to detect a safe turnout area (e.g. in winding roads on the way to Tahoe) soon enough that one can actually use it.

Some roads have very handy marked turnouts that make this very easy, but many times there are Very Small locations that one could have used had one known about it ahead of time, or been moving (even slower) slowly enough to turn off right away. Many of these are not clear that they are large enough for one car until you're next to it, and often times you can't easily tell whether they are paved or not.