> You can’t really do multiple layers of tunnels with cut and cover. Sure you can. I ride such a line every week day. True about the most direct route, but ha

> You can’t really do multiple layers of tunnels with cut and cover. Sure you can. I ride such a line every week day. True about the most direct route, but having uncontested right of way tends to make a big difference in travel times. And in grid layouts, where you want to go is closely aligned to how you get there.