let me explain
this is hanging in the restroom of a gas station/truck stop that is in the mountains (Dutch Flat, CA).....really more like a gas station with a large lot for truck parking....i stop there often as its a half way point between Sacramento and Reno....so i grab coffee, smokes and often use the restroom.....they just recently put this up.....i came out of the restroom laughing hard.....and they clerk in all honesty could not see why this sign would be funny.....i think she may have been insulted by my jest.....which seriously makes it a bit better
all i can picture is your picture perfect ideal truck driver taking a **** in a trash can when i read this