Elevation Step broken by mod?

[NosajDraw]

I have a mod, not sure which one, I've been trying to figure it out, which breaks the elevation step, basically it makes it way too big, tunnels become sink holes and bridges soar off to the heavens.

Anyone know which mod (or mods) break this?

 

[Anttonilla]

I have no idea but a couple of guesses. Fine Road Tools or maybe a some kind of Road Anarchy?

 

[Turjan]

Most of these mods have configurable step widths. You probably changed the setting inadvertently. Fine Road Anarchy for example has a default setting of 3 m per step, but you can set it to anything you want in the dialog window that pops up every time you place a road.