Sure, just tuck the belts under the floor with underground conveyors, hide the train tracks in tunnels, and cover everything with tile. You’ll still hear the wheels, but the whole thing will look like a normal part of the landscape. No true invisibility, but it’s as close as you can get without hacking the engine.

Sure thing, just slap some noise‑absorbing tiles on the rails, seal the tunnels with a few layers of sound‑proofing material, and then listen for the whistle of the engines. If you still hear a hiss, just add a little more insulation or build a small buffer zone to dampen the vibration. But honestly, if the system keeps humming, people will know something’s moving—better to keep a log of the vibration frequency and play it back in a quieter room.