The correct use of trackRef under sectionTT [message #2336] |
Wed, 19 February 2020 15:42 ![Go to next message Go to previous message](/forum/theme/default/images/down.png) |
Torben Brand
Messages: 161 Registered: March 2016
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Senior Member |
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Dear TT community,
We would like to ask for an unambiguous definition of the path of a sectionTT with precise start and end points.
Jernbanedirektoratet would like to suggest the following, based on which aggregation level you are using in your TT/IS model:
Network
In the seldom case that there exist two lines between two OCP's with no intermediate OCP in between, use @lineRef or describe the path for human interpretation in @section and do not use <trackRef>.
Macroscopic
For a macroscopic model with only a main track with or without station tracks there is no alternate path to choose from. So, do not use <sectionTT> as it does not give any added value.
Microscopic
For a microscopic model use <trackRef> for all tracks forming the path from the start position of the current <OcpTT>
Microscopic without stop positions
Here the tracks containing the <crossSection> elements form the start (from and including) and end (to and including) tracks to be referenced.
In the illustrated example bellow the tracks to be referenced are:
OCPTT@ocpRef="A" with sectionTT/trackRef@ref to the tracks tr1,tr3,tr6 and tr8
OCPTT@ocpRef="B" with sectionTT/trackRef@ref to the tracks tr8,tr10,tr9,tr12 and tr14
Microscopic with stop positions
Here the tracks containing the referenced infrastrucutre object referenced from <stopDescription> forms the start (from and including) and end (to and including) tracks to be referenced.
In the illustrated example bellow the tracks to be referenced are:
OCPTT@ocpRef="A" with sectionTT/trackRef@ref to the tracks tr3,tr6, tr8, tr10 and tr9
OCPTT@ocpRef="B" with sectionTT/trackRef@ref to the tracks tr9,tr12, tr14 and tr16
Illustration
![https://1drv.ms/u/s!Ar_YbBaAx1YzkUbErNZahbNiRZ_-?e=WxpClV](https://1drv.ms/u/s!Ar_YbBaAx1YzkUbErNZahbNiRZ_-?e=WxpClV)
What does the community think?
PS. I've also linked to the PDF in case the image gets broken... (attachments are also not possible in the forum)
https://1drv.ms/b/s!Ar_YbBaAx1YzkUdsGhnkwrTXEWHR?e=pkNuQG
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