User:RailML Coord Documentation/IS:speedSection

From railML 3 Wiki
Jump to navigation Jump to search

The element “speedSection”

Introduction

Speed limits are modelled in railML® using <speedSection> elements in combination with <speedProfile> elements. A simple example is shown below. A more complex example is provided in Example 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.

SpeedProfile1.pdf

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

Open Issues

  1. Shall the location of <speedSection> in railML® be provided as linear element or as area element?
  2. A railML® attribute for <speedSection> is missing to represent the UNISIG variable Q_FRONT.
Retrieved from "https://wiki3.railml.org/index.php?title=User:RailML_Coord_Documentation/IS:speedSection&oldid=7015"