I don't think the appetite for train travel is a linear thing. For instance here in the Seattle/Portland corridor, the train trip is both slower than by car, a

I don't think the appetite for train travel is a linear thing. For instance here in the Seattle/Portland corridor, the train trip is both slower than by car, and more expensive than the car's gas bill. If it were consistently faster and/or cheaper, I can't help but think that the demand would spike dramatically.