Sadly enough, not many people don't know how interstate mile marker's work. Me and the wife will be on a trip and she is simply AMAZED that I know our exit is 88 miles away without using a sign. I had to explain the mile markers to her, she said she never even noticed them until I pointed them out.
I'm sure she isn't the only one
That is very true and sad. It's something I've never thought of since I'm coming from being a truck driver hopefully entering the career EMS world I always know exactly what mile marker I'm at but many people don't.