UC:IS:DriverAdvisorySystem

Driver Advisory System Subschema: Infrastructure

(version(s) 2.3)

For general information on use cases see UC:Use cases

Use case / Anwendungsfall

Driver Advisory System (DAS); Fahrerassistentsystem;

Description / Beschreibung

The Driver Advisory System (DAS) is an on-train driver support system which advises a driver on the most energy-efficient speed profile with which to meet the train’s current schedule. The DAS receives as input the current schedule (which may be updated at any time) together with a range of static or near-static data relating to the track, namely: topology, topography, asset locations and speed restrictions; and various parameters relating to the vehicle itself.

DAS use case.png

Data Flows and Interfaces / Datenflüsse und Schnittstellen

Data inputs
Track attributes (Infrastructure):

• Track Centre Line (as a polyline)
• Track altitude (polyline)
• Geometry: Track curvature
• Topology: Node-link model
• Route IDs
• Track IDs
• Mileposts / kilometre posts id, location
• Junctions id, location
• Loop ends id, location
• Platform ends platform ids, location
• Tunnels id, location (,envelope)
• Signals id, location, signal type
• Permissible speeds including permanent speed restrictions (PSRs), qualified by direction of travel and train type
• Temporary speed restrictions (TSRs), qualified by direction of travel and train type
• Emergency speed restrictions (ESRs)
• Locations of the following may also be required in the future (TBD):
  • Signal berths id, location
  • Bridges id, location
  • Road crossings id, location

Schedule attributes (Timetable):

• Train Service Id
• (Sequence of) scheduled locations
  • location name
  • location as Track attribute
• For each passing location
  • passing time and tolerance (before and after)
• For each stopping location
  • arrival and departure times

Vehicle attributes (Rollingstock):

• Formation or consist
• (mass, length) profile
• Maximum speed
• Braking parameters (braking curve, brake delay, brake build-up)
• Traction parameters
• Coefficients of resistance

Data outputs
DAS operating logs

• Train id
• Time
• Train location
• Train actual speed
• Advised speed
• Driver entered parameters

Interference with other railML^® schemas / Interferenz mit anderen railML^®-Schemen

• rolling stock
• timetable

Characterizing Data / Charakterisierung der Daten

This section serves to specify the required data regarding certain aspects.

How often do the data change (update)?

• Track attributes: nearly static except for TSRs and ESRs (weekly/daily)
• Schedule attributes: daily, with realtime changes
• Vehicle attributes: occasional changes (event-driven)

How big are the data fragments to be exchanged (complexity)?

• huge (region)

Which views are represented by the data (focus)?

• Train regulation
• Energy

Which specific data do you expect to receive/send (elements)?

In this article there is information missing with respect to affected elements. Please help improving the railML® wiki by filling the gaps. Possibly, you will find further details on the discussion page. Ferri Leberl (Diskussion) 18:04, 23. Jun. 2016 (CEST)