Add crossing angle to crossing element for unambiguous layouting

The railML 3.3 data model of the (simple) crossing does not allow an unambiguous layouting of the (simple) crossing.

Links

• Forum discussion:
  • Torben Brand, 27.10.2025: https://www.railml.org/forum/index.php?t=msg&goto=3922&#msg_3922
• Gitlab issues:
  • #719
  • #685 (closed)
• Wiki documentation:
  • IS:crossing: https://wiki3.railml.org/wiki/IS:crossing

Proposed solution in railML 3.4

Add mandatory child element <ratio> to element <crossing>.

The <ratio> has the mandatory attributes:

• @fromNetElement referencing the netElement on which the crossing is located on by spotLocation
• @toNetElement referencing the (crossing) neElement that is closest to the first netElement (in any direction)
• @denominator describing the ratio as tangens of the crossing angle (0<angle<90 degrees) opened by the two referenced netElements in a mathematical positive orientation. For a crossing angle of 90 degrees (ratio is infinite) the denominator shall be set to the value "0"