The idea came from the previous design I had made entitled "no parking". I was thinking about using letters as characters. I can't remember exactly how I got the idea. I love wordplay. I tend to look at things differently. I had it in the back of my head for a while and then one day I decided that I have to draw it. I am so happy that it got printed. Thank you Threadless! And thanks to everyone for rating it. And in case anybody wants to know, the letters r l t have no specific meaning. I was going through the alphabet trying to figure out which letters would be best to transform into characters. Those three were the result.