06-28-2021, 05:59 PM
(06-28-2021, 05:10 PM)tomh009 Wrote:(06-28-2021, 04:28 PM)danbrotherston Wrote: A bridge is also an enclosed space, you cannot escape it, and a bridge would be orders of magnitude longer than a tunnel. Making the tunnel wider is more feasible because the tunnel is shorter.
Pedantic nitpicking alert: "orders of magnitude longer" would imply at least two orders of magnitude, or 100x, longer. I expect that's not what you actually mean.
Yes, I meant, an order of magnitude, which it is, a two tunnels would run a combined 25 meters or so, as compared with at least 250 m shown for a bridge and causeway.