We are currently updating the pages to include all regionally different guidelines. If you find inconsistencies, please refer to the English page. Thank you!
Elevation
Elevation is one of the attributes of all Road types.
In most cases the elevation should be defined "as is" in the real world. Standard "Ground level" or 0 or in case of a cross-over / fly-over the upper road should be defnied with an elevation one higher. In case of a tunnel the elevation could be -1 or -2.
One exception: the elevation of railroads should be set at -5.