We can't base public policy on once in a century black swan events. Speaking as someone who lives in a large city, I appreciate an efficient subway system because it means I can save the money that I otherwise would have had to spend on a car. After car payments, insurance and gas, you're easily talking at least 10K annually getting sucked out of your bank account just to maintain a depreciating asset. I'd much rather be able to invest that 10K.