Boy you could built storm shelters and "bunkers" fast as fuck with this.
What this vide actually shows the versatility of the "Zipper Truck" system which helps create tunnels with openings very quickly with no permanent support work.
Discussion
I walked through a structure called the Temple of Hercules in Delos, Greece that used stones in this manner.
Except the stones those old Greeks used were twice the size of these. No idea have they did that 2,500 years ago…
The burocracy probably hate this
Every time there's one of those $500,000,000 lotteries I ask my wife buy a ticket. She always asks 'what would you do with that kind of money?!
Here's another thing.
Want
So cool
What if I need two lanes?
Less work to built two tunnels with a split road than one wider tunnel.
So beautifully simple & clever.
Like building a massive pizza oven.