Originally Posted by Blue Icebreaker
It says "car wash" - the line written in red. But english transcribed in Farsi, phonetically! "Kar uaš"
Thank you for this information. All along Iran I had admired the beauty of these inscriptions without having the slightest idea of their meaning.
Unfortunately I didn't and still don't speak a single word of Farsi, but people were always eager to help.