Zach Sellands writes on his personal blog:

Whenever I travel, whether to different states or entirely different countries, one of my favorite things to do is look at road signs. Public service signage in general is sort of fascinating to me, as it’s meant to be universally understandable, a true “lowest common denominator” form of communication. Also, it can often be quite funny.

Click through the link to see his post about a speed bump sign he saw while in Nicaragua, and the funny variations he dreamed up.