In order to fully understand the idea, please refer to this website:
http://www.upworthy.com/this-future-map-of-the-united-states-is-way-cool...
First of all, government-funded public-works projects offer a way to combat the main issue of the recession, high unemployment. A huge project like this is just the stimulus necessary to get America back on its feet.
Secondly, this high speed rail system offers an excellent alternative to both driving AND flying, effectively lowering our carbon footprint. Additionally, this rail system could provide a faster (over short distances), cheaper option for most average (or wealthy) American families.
Lower CO2 emissions.
Boost our economy.
Provide faster, cheaper, and easier transportation.
3 in 1.