The cost of making a trip differently in the US, in terms of time, effort, and driving habits, is small. For any individual trip, I’m not sure how many people will change their habits. My wife doesn’t, and the Prius is great because she just drives and gets 40+mpg. I pay more attention and can usually get over 50MPG.

So will people use the new technology from Ford that shows a more economical route? I don’t know. I think if there’s very little personal cost in terms of time or hassle, they will. If it’s annoying, has more traffic, takes more time, etc., they won’t.

Still, it’s a step in the right direction.