Yeah, that has societal cost too, to be sure. Which implies prima facie that such infra (roadways, high-frequency train lines) should be minimized. Since the th

Yeah, that has societal cost too, to be sure. Which implies prima facie that such infra (roadways, high-frequency train lines) should be minimized. Since the throughout of mass transit is so much higher (iow, the societal cost per-user), mass transit is a better way to minimize those costs than cars.