Sure, and you spend the same amount of money for 1 person as you do for the max capacity of your vehicle when driving but it would be 5x the price on the train. I totally agree we have a lot to work on but we don't have to account for every single scenario. The train between DC and NYC, and all the cities in between, is cheap, reliable, and fast and the reason is because ridership is high enough to pay for the service. Make a more reliable and comfortable local public transit and it will work the same way. Nothing will eliminate private vehicles but if you greatly reduce their need it's a lot easier to solve some of these other problems like traffic, parking, emissions, etc...