You could prove this rather easily if you had the means. Let's say there are a few thousand people who have traveled from NY to LA using this underground tunnel. There are several means for tracking this, take their cell phones for instance. One minute they are using a tower in NY, 30 minutes later their cell phone is contacting a tower in LA.

Also a handful might get a parking ticket in NY and then one in LA an hour or so later, if they can take their cars or even rentals, which would raise a flag if people actually looked for these weird occurrences. I am sure if you brainstormed long enough you might find a method actually doable. Credit card statements would be another good method in discovering the existence of these super fast travelers.

There might be a policy where they have to follow certain rules to avoid detection but there is always someone who either forgets or doesn't follow the rules. If you could get someone on the inside to leak you some data of people you would suspect to have access to such a transit system you could write a program to go through and search for the "impossible" circumstances. If you are willing to break the law and do it yourself then it is relatively easy to do.

how would this system protect itself from earthquakes?

ok just a random thought here....but when fighter pilots are maneuvering at high speeds they where a G suit, just like when the astronauts launch into space. Now is it possible if we have the technology for these underground tunnels, that we could possible have a G suit capable of withstanding higher G's then normal?

I believe this is reality already. When I was 6-9 years old I had reoccurring dreams and memories about designing a train system like this in a vacuum tube, with no pressure inside to compensate for G-Forces, propelled by pulsating magnetic current throughout the tube. In dreams the ride in these trains were smooth like sitting in your couch at home. The dreams were so vivid I remember them all these years later, and believe today that magnets hold the key to our next stage of technological advances.

Dude, in order to make a super massive underground world you would have to dig out a bunch of dirt from underneath the Earth and pile it up somewhere. Somebody would have already Google Mapped "big pile of dirt" and uncovered this astonishing conspiracy of Ant People.

Sorry I only bothered to read page 1, but in elementary school I made a project of a small rail that used magnets to propel the train and it worked alright... we theorised that if we were to electrify the magnets a section at a time the magnets ahead would not push the train backwards, and therefore by reversing polarity it will be propelled forward. Kind of how a bullet train works. I think it is very possible but true? I do not know

This would very cool!It would be cool to live in montana but work in arizona.Or live in Florida but work in Seattle.Imagine a global network.High speed bullet trains already exist in japan.As far as expense goes,probably cheaper than we think.Maybe people should pay more attention to the Boob tube as they put it.

Originally posted by THX-1138
Dude, in order to make a super massive underground world you would have to dig out a bunch of dirt from underneath the Earth and pile it up somewhere. Somebody would have already Google Mapped "big pile of dirt" and uncovered this astonishing conspiracy of Ant People.

...so the thought didn't occur to you that they put the dirt back over the tunnel after they dug, thus concealing the tunnels??
Where would the logic be in collecting all that dirt and piling it up in some random place? Come on, think before you post.