Better transit would go a long way, it's true. But for reasons we haven't really been able to diagnose, building new transit infrastructure -- any big infrastru

Better transit would go a long way, it's true. But for reasons we haven't really been able to diagnose, building new transit infrastructure -- any big infrastructure projects, really -- has become ludicrously expensive in the US. It's almost certainly still worth the investment, but the numbers are so eye-popping that it requires significant goverment subsidizing, which runs into political problems that are hard to get around in the current environment.