| [railML3] Additional Switch attributes [message #3747] |
Mon, 13 October 2025 10:59  |
Dominik Looser
Messages: 49
Registered: March 2020
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Member |
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Dear all,
Our client would like to transfer additional data for switches via railML 3:
- ratio, e.g. 1:7, 1:8.21, 1:9, 1:11.3, ...
- rail weight
We propose to add new attributes to <switchIS> or <switchIS>/<left/rightBranch>
Best regards,
Dominik Looser
trafIT solutions
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| Re: [railML3] Additional Switch attributes [message #3813 is a reply to message #3767] |
Fri, 05 December 2025 12:02  |
Terje Nordal
Messages: 21
Registered: December 2023
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Junior Member |
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Dear all,
I have been able to extract a little more information on the background for relaying the rail weight for switches in our ETCS design process. The configuration and installation of point machines differs based on the rail weight (60kg, 54kg, 49kg etc.), and is typically communicated to our suppliers through written documents. This may continue, but since the weight of is an important parameter it makes sense to have it being part of our models as well.
The contouring of the track is not an important factor in this configuration, but it typically affects other physical properties of the switch. One example of this is the distance between the rail joint and point tip of the switch (small differences, but still differences).
Both Siemens and internal Bane NOR colleagues have confirmed this information about the rail weight.
I have checked what Bane NOR databases describe with regards to this for our tracks as well, and it seems the tracks themselves (which are the ones we typically model in railML) do not have this property. It is rather the rails themselves (not part of our modelling) that describes such properties, which makes sense since the two (or in rare cases even more) rails are separate physical objects. This, I think, supports the direction of having such a parameter for switches.
Best regards
Terje Nordal
Bane NOR
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| Re: [railML3] Additional Switch attributes [message #3923 is a reply to message #3837] |
Sun, 08 March 2026 21:56 |
christian.rahmig
Messages: 566
Registered: January 2016
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Senior Member |
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Dear all,
let me summarize the solution proposal for the switch ratio as described in updated Gitlab issue #685 [1]:
* The attribute @ratio shall be added to elements <switchIS> and <crossing>.
* The ratio describes the tangens of the switch/crossing angle at the end of the switch/crossing
* The attribute contains the denominator of the ratio of the switch/crossing.
* The attribute's data type shall be a float value greater than zero.
* Typical values are "18.5", "14", "12", "9", or "7.5". Other values are possible.
Anything missing?
[1] https://development.railml.org/railml/version3/-/issues/685
Best regards
Christian
Christian Rahmig – Infrastructure scheme coordinator
railML.org (Registry of Associations: VR 5750)
Altplauen 19h; 01187 Dresden; Germany www.railML.org
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