This must be the 19% that commutes via bicycle.
If 19% of Americans commuted via bicycle we wouldn't have an energy crisis.
My tongue was firmly planted in my cheek. In all seriousness, I just find that a lot of the people who want gas taxes to be insanely high don't even drive and have no idea what it's like to live somewhere rural and have to commute. I drive about 70 miles a day, I would love to do it in a more energy efficient car, sure, but I'm not going to buy a new hybrid car (mine's on its last leg) if I'm unsure of its value in 5-8 years. It's the Edsil factor I'm worried about.
You do realize the Prius has been out in Japan for over ten years, right?