How to use it:

After downloading the zip file and unzipping it,

Method 1:

Open the blend file --> select the railway --> Edit Mode --> remove the old curve (optional) --> draw new curve --> make changes in the geometry nodes input settings that you find in the modifier panel right of the screen.

Method 2:

Open the blend file --> Add a new curve (only scale it in edit mode) --> Copy modifiers (select the new curve, shift, select the old railway, Ctrl L, copy modifiers), make changes in the geometry nodes input settings that you find in the modifier panel right of the screen.

Method 3:

Open the blend file --> Add a new curve (only scale it in edit mode) --> Add modifier --> Geometry nodes --> Apply Railway Generator, make changes in the geometry nodes input settings that you find in the modifier panel right of the screen.