I agree, and my phrasing was imprecise; we do need to assume that roads will be used to some degree, but we also need to allow for types of living that don't use freeways, or even perhaps allow living without a car.
Right now local regulations require large amounts of parking, which means large amounts of the most valuable space devoted just to cars, and forcing people to pay for the car. If you're forced to pay an additional 10% in rent to cover the space used for parking, then you're probably going to get a car.
If people were allowed to make the decision to not have cars and reap the financial benefits, we'd see a bigger shift.
As it is, car use is regulated into the way that we build things.
Right now local regulations require large amounts of parking, which means large amounts of the most valuable space devoted just to cars, and forcing people to pay for the car. If you're forced to pay an additional 10% in rent to cover the space used for parking, then you're probably going to get a car.
If people were allowed to make the decision to not have cars and reap the financial benefits, we'd see a bigger shift.
As it is, car use is regulated into the way that we build things.