That's the tricky bit in physically-routed infrastructure: pipelines, canals, rail, expressways, media (vs. transmission-based) comms links. None of them abide well with airgapping.
The comms-transport link goes back at least to the rail era when telegraph lines sprang up along them. You might have heard of one such venture: the Southern Pacific Railroad Internal Network Telecommunications, better known as SPRINT.
https://www.npr.org/2012/10/15/162963607/sprint-born-from-ra...
A delivery-based fulfillment service, say, Amazon, might have interest in some (though hardly all) of these as local distribution hubs.
Rezone and densify, and build a mixed use walkable community of residential commercial and office.
Now if only there were some way to do that with people, not just with stuff (cough mumble public transit cough).