Comment by to11mtm

I actually got to see one of those once.

For a major trans-oceanic backbone provider, at least 15ish years ago they had a mile or two between Detroit and Chicago where both ends were on the same side of the interstate highway.

But it's more frequent on DAS (Distributed Antenna Systems, AKA small-cell or micro-cell) networks.

Also the challenge of when fibers are leased (if that's still a thing, based on the networks I helped design I'd say 'probably').

They really are analogous to Lamport's "Distributed System" quip; A damaged fiber owned by a company you have never heard of can wreck your day.