|
But if you don't already have subways, digging them from scratch while a city still functions on top is basically impossible. And geology can be a problem too--I don't know about China, but around here we will never, ever have subways because the whole area is sitting on top of solid limestone rock.
But either way, I think the problem with the normal trams is less about danger and more about convenience. They move slowly, and then they stop every couple of blocks and hold up traffic. (This is exactly what our public buses do here.) With this over-traffic model, when the tram stops the rest of the traffic just keeps right on going.
|