We use projections in transportation planning all the time. I am not convinced they are sound. Dealing with the provision of commuter parking for a commuter railroad, for example, we rely on population/household forecasts from the metropolitan planning organization along with some in-house variables that assume that most people will drive to access transit. But if we build the transit station so that the only way to access it is by driving, than we are fulfilling our own prophecy. With energy costs dramatically increasing, is it rational to be planning for the continuing use of the car as the predominant mode of transportation in our community? This is not an example of Strong Towns planning.