Shademp | DCFFVII Unlocked: Exploring the Deepground Monorail @Shademp | Uploaded September 2021 | Updated October 2024, 2 hours ago.
Skipping the cutscene trigger for this auto-scroller, Vincent can run along the rails just fine. In the video I use cheats for moon jump and high movement speed.

Areas behind you will unload as you progress.

There is no way to reach the door beyond the falling platform.