This is often the nearest we get to a gate here:
Even if you don't speak German, this sign makes it very clear that no-one, absolutely no-one is to pass this point. The reason is forestry work taking place in this area, and the text spells out very clearly the risks of ignoring the sign, generally implying that it would be certain death, and your own fault.
One one problem, I've just come past the sign from behind, having cycled through the Arboreal Death Zone blissfully unaware of the risks because there wasn't any sign in the other direction.
Thankfully, this was a Sunday; Germany goes to sleep on Sundays so there was no-one cutting anything.