>>6102Is there any way we could use GPR to our advantage? Tunnels already exist under cities, from sewers to weirder stuff. We need to either avoid them or use them as existing infrastructure to expand on. Also there's really no way to defeat GPR, it can now penetrate up to 100ft, which is first of all way too deep (every entrance from a building would require an elevator or very long sloped descent), and they would be able to see the entrance points anyways, just not a whole map of the tunnel system.
Also how would we get rid of mined material? The best civilian vehicle for the job is a pickup but they don't hold very much, progress would be super slow that way. Anything larger, or constant revolving pickups, would draw attention.
I think the only answer to all of these is that tunnels are only viable in communities that can resist surveillance, or which are already functionally independent, making surveillance useless in the short term. Even if they can map the tunnels, tunnels help mask movement, hide from bombs, and could house facilities for weapons production