How to avoid tolls with Google Nav?

[bigbabys]

I looked around a bit before asking this, but I didn't find anything. When using Google Navigation I find there is no option to avoid toll roads. Now this seems like something that would be a given to provide with any turn by turn direction software. I realize the software is in Beta but I was just wondering if maybe I am missing something? Or is this something they had to leave out to keep the software free? (maybe verizon didn't like the idea of them providing a free turn-by-turn that is better than their own pay server?)