Allows to remove the gravel and sleepers from underneath the rails.
To do so research Railways and use the shortcut from the shortcut bar.
Make sure to read the tooltip of the shortcut.

This is a re-creation of the original Naked Rails (and its Factorio 1.x successor).
It does the same thing but the code is completely new.
It should be able to convert savegames from Factorio 1.x that had naked rails.

The one thing this mod does not provide anymore is a way to destroy rails.