Except today, when the BBC has some footage of an HGV getting wedged in the hairpin at the top of Clifton Vale.
We've looked at this problem before.
- On the way up, if you can't see anyone in front of you, go for it.
- On the way down, hang back enough to get a view, and go for it if nobody is obviously coming up. But swing wide before even beginning the turn in, or you won't be lined up to take the next corner