"Large infrastructure projects are complicated things that all have hundreds of consequences, some good and some bad. It is easy to come up with good and bad side effects of high-speed rail: More people coming into a centralized train station might reduce long car trips associated with sprawling airports (that's good), but increase congestion in the city (that's bad).
"These ideas are so cheap that unless they are seriously quantified they have no place in the debate. Serious accounting, not clever debating points or soaring rhetoric, is the critical ingredient in good public decision-making."
Thanks to Franny Ritchie