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| {{useCase|IS|2.3|title=Driver Advisory System|RS=1|TT=1|abbr=DASY|reporter=IS}} | | {{mirror}} |
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| {{UC title}}
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| Driver Advisory System (DAS); {{Deu|Fahrerassistentsystem}}; {{Fra|nom descriptif en Francais}}
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| {{UC description}}
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| 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.
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| [[file:DAS use case.png|800px|DAS use case.png]]
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| {{UC flows}}
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| <u>Data inputs</u> <br>
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| Track attributes (<i>Infrastructure</i>):
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| * Track Centre Line (as a polyline)
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| * Track altitude (polyline)
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| * Geometry: Track curvature
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| * Topology: Node-link model
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| * Route IDs
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| * Track IDs
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| * Mileposts / kilometre posts id, location
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| * Junctions id, location
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| * Loop ends id, location
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| * Platform ends platform ids, location
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| * Tunnels id, location (,envelope)
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| * Signals id, location, signal type
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| * Permissible speeds including permanent speed restrictions (PSRs), qualified by direction of travel and train type
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| * Temporary speed restrictions (TSRs), qualified by direction of travel and train type
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| * Emergency speed restrictions (ESRs)
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| * Locations of the following may also be required in the future (TBD):
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| ** Signal berths id, location
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| ** Bridges id, location
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| ** Road crossings id, location
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| Schedule attributes (Timetable):
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| * Train Service Id
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| * (Sequence of) scheduled locations
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| ** location name
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| ** location as Track attribute
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| * For each passing location
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| ** passing time and tolerance (before and after)
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| * For each stopping location
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| ** arrival and departure times
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| Vehicle attributes (Rollingstock):
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| * Formation or consist
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| * (mass, length) profile
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| * Maximum speed
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| * Braking parameters (braking curve, brake delay, brake build-up)
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| * Traction parameters
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| * Coefficients of resistance
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| <u>Data outputs</u> <br>
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| DAS operating logs
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| * Train id
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| * Time
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| * Train location
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| * Train actual speed
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| * Advised speed
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| * Driver entered parameters
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| {{UC interference}}
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| * rolling stock
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| * timetable
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| {{UC data}}
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| This section serves to specify the required data regarding certain aspects.
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| {{UC update}}
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| * Track attributes: nearly static except for TSRs and ESRs (weekly/daily)
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| * Schedule attributes: daily, with realtime changes
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| * Vehicle attributes: occasional changes (event-driven)
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| {{UC complexity}}
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| * huge (region)
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| {{UC focus}}
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| * Train regulation
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| * Energy
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| {{UC elements}}
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| {{missing information|user=[[Benutzer:Ferri Leberl|Ferri Leberl]] ([[Benutzer Diskussion:Ferri Leberl|Diskussion]]) 18:04, 23. Jun. 2016 (CEST)|topic=affected elements}}
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