[DaiPlusPlus]

Bridge, yes.

Tunnel, no. It’s very feasible and practical from a civil-engineering perspective, but the economic value of a road connection between NI and Scotland has not been demonstrated to outweigh the economic cost of its construction.

[Chris2048]

Infact: https://www.theguardian.com/uk-news/2021/feb/14/rail-bosses-...

[arethuza]

Even more fun: the relevant area of sea has had one million tons of explosives dumped there as well as chemical weapons and even some radioactive waste:

https://en.wikipedia.org/wiki/Beaufort%27s_Dyke

[rusk]

What’s feesible? The tunnel or the bridge? I’d heard the tunnel wasn’t possible due to the particular geography of the channel. But a bridge? Now that I’d be interesting I seeing. There used to be a giants causeway across there in mythical times ...

[onei]

The bridge is unfeasible because the channel is around 200m deep in places which makes it crazy expensive. I also found a couple of references to nuclear waste in the trench, but that might have been for another site.

[DenisM]

Floating bridge is a thing tho https://www.wired.com/2016/04/takes-keep-7700-foot-floating-....

[rusk]

Both of which I was aware of but I heard that some kind of suspension design would work. The tunnel is infeasible because there’s a very deep trench there, and that as you mentioned is filled with all sorts of nasty stuff.

[anonymousDan]

I believe the latest proposal would swerve to avoid the trench.