@nomi I don't think Google generally knows how much you'd pay in tolls. I've driven on bridges where you're tolled per axle, taken ferries where you're tolled per passenger, and I've heard of highways which have a computer adjusting tolls in real time to maintain a target number of cars in the toll lane.
@khird
Frankly I'm kind of insulted that Google thinks my personal information isn't considered valuable enough to pay for this feature