User:RailML Coord Documentation/IS:speedSection
The element “speedSection”
Introduction
Speed limits are modelled in railML® using speedSection elements in combination with speedProfile elements. A simple example is shown in section 1.2. A more complex example is provided in section 2.2.3 of railML® element speedProfile.
Best Practice / Examples
A speed limit valid for a speed section is presented in railML® by a speedSection element. The speedSection element defines the start and end location of the speed section and the maximum speed limit valid for this section.
Figure 1: Example Static Speed Profile for a railway track section
The modelling in railML® is:
<speedSection id="spsec100" maxSpeed="80" isTemporary="false" isSignalized="false">
<name name="JNA-201" description="Speed section" language="EN"/>
<linearLocation id="spsec100_lloc" applicationDirection="normal">
<associatedNetElement netElementRef="ne_102" keepsOrientation="true"
posBegin="200.0" posEnd="600.0">
<linearCoordinateBegin positioningSystemRef="lps01" measure="11200.0"/>
<linearCoordinateEnd positioningSystemRef="lps01" measure="11600.0"/>
</associatedNetElement>
</linearLocation>
<validForSpeedProfile ref="ssp_basic"/>
</speedSection>
Each railML® speedSection element must reference (at least) one global defined railML® speedProfile element. A speedProfile element specifies a train type for which the speed limit given by a speedSection element shall be valid.
For example a speedProfile element can be used to provide for ETCS a Basic Static Speed Profile, a Specific Static Speed Profile (cant deficiency or brake type depending train categories, ETCS Operational Train categories or International Train Categories) or an Axle Load Speed Profile. For detailed information see speedProfile Element (section X)
- Example
<common id="co_01">
<speedProfiles>
<speedProfile id="ssp_Basic" isBasicSpeedProfile="true" mVersion="32">
<name name="ETCS Basic SSP" description="Basic ETCS static
speed profile used by trains for which no Specific SSP matches"
language="EN"/>
</speedProfile>
</speedProfiles>
</common>
Additional Information
Notes
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Open Issues
- Shall the location of “speedSection” in railML® provided as linear element or as area element?
- A railML® attribute in the speedSection element is missing to represent the UNISIG variable Q_FRONT.