Everyone knows there are unspoken rules about using public spaces, especially public spaces like subways where too many human beings are crammed together and touching each other. In London, some wonderful, unknown people have taken it upon themselves to post versions of those rules all over the tube.

And if you didn’t quite get the message:

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Finally, an honest take on the difference between a good subway line and a dirty, old, unreliable subway line:

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If you have ever taken a train in London late on a weekend night, you know that this is a wise choice:

I always bring my snake on the subway:

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Residents of D.C. will appreciate this one: