I tried to lobby the North Texas Tollway Authority to reduce the rates on motorcycles. As mentioned they charge for two axles, same as a car. I got as far as the Director of Customer Service and he felt it was his responsibility to say, "No, reduction and no one else in the country does it either."
I believe I've seen different pricing for motorcycles on other states' tollways or turnpikes, but can't remember where.
Anyway, I have mine in the windshield pouch and it only reads about half the time. Since their cameras can't see the plate under my tour pack, it's their loss. Had they been a little more cooperative, I may have been more concerned about missing a toll or two.
Just another example of how we are often seen as second class citizens.