Are those population figures taken from the 60s when the trains were being built, or from now half a century later after the profound force multiplier of having

Are those population figures taken from the 60s when the trains were being built, or from now half a century later after the profound force multiplier of having high speed rail on that scale have enabled substantial density and growth along its length? People talk about these train projects like you build them and take 20% of the cars off the congested highways and thats it. You don't build trains just to meet existing demand. You build trains to create demand, increase efficiency, and cause substantial economic growth and development as a result - in the long term.