Wow! Here in SF they're building cross-town BRT for $5m/mi. Blows my mind that London's subway costs that much to extend, dozens of times more expensive. And we

Wow! Here in SF they're building cross-town BRT for $5m/mi. Blows my mind that London's subway costs that much to extend, dozens of times more expensive. And we have earthquakes to worry about, London doesn't.