Letters Of Transit Puns

My dad and I were driving to pick up some pizza the other day, and drove by the local community college. They have one of those new HD billboards, which was flashing garish advertisements for their classes and programs.

"That's a terrible sign," my dad remarked.

"Yeah, those things are distracting and annoying," I agreed. "The things flash too fast for you to really read it, and the color contrast makes it hard to read while you're driving late at night. It's not like the sign in front of my school at all (I'm a teacher). My school has slow transitions and clear lettering that makes things easy to read. It's what makes our billboard auspicious."

My dad frowned. He could tell something was coming. "Why's yours auspicious?"

"Because it's a good sign."