This stands for up Haven turn right. Which is the directions to get to Chaffey College in Rancho Cucamonga California. This is meant to make people who do not know what UHTR stands for think you are going to a good school, when you are really just stupid and don't have the grades for a 4 year.
Teacher "So what college are you going to?"
Teacher "Wow, sounds like a good school, where is it?"
Student "Up Haven turn right"