Trompe-l’œil sleeping policeman

This caught me out for a moment in Southwark the other day. Looked like a sleeping policeman… 

Turned out to be Trompe-l’œil. Wonder if it’s intended to fool people once only, as I doubt it’ll slow down the speedy regulars. 

Also just realising it might be called anamorphosis rather than Trompe-l’œil. Whatever it’s called I’ve always loved 2D/3D spacial perception tricks (Ref) :)