In use, the plough is lowered to rip up the middle of the track as it is hauled along by a locomotive. This action breaks the wooden ties (sleepers) which forces the steel rails out of alignment, making the line impassable by later rail vehicles.
In a lot of places the wood has been replaced by reinforced concrete, I’m not sure if the ploughs can be used anymore.
On the other hand, sometimes it is aspirational, in the sense that the creator hopes that having a place for people to post will lead to discoverability. One day someone may come across it and decide to post just because it is there.
If you build it, they will come
Searching for communities when I came across with no content or a post or two from a year ago, I ignore them. Why should I post/comment in a place that there is nobody?
Cautionary Tales
We tell our children unsettling fairy tales to teach them valuable lessons, but these Cautionary Tales are for the education of the grown ups - and they are all true. Tim Harford (Financial Times, BBC, author of “The Data Detective”) brings you stories of awful human error, tragic catastrophes, and hilarious fiascos. They’ll delight you, scare you, but also make you wiser.
I think the description is better than what I can write.
We are one in my ass