Suspiciously no cancelled trips and skipped stops

[traines-source]

I have never seen any cancelled trip in the feed. While I may of course have overlooked them (or VBB is just so reliable that there are no cancelled trips) I think this is suspicious. E.g. in the last two days, there are no cancellations, if my search is correct:

for f in */*.gtfs-rt.pbf; do cat $f | npx print-gtfs-rt-cli -j -a | grep -c "schedule_relationship\":3"; done

There are also no skipped stops (schedule_relationship 1), even though there are multiple disruptions today, e.g. M13 being diverted between Möllendorffstr./Storkower Str. and Warschauer Str. and Bus 240 between Betriebhof Lichtenberg and S+U Lichtenberg.

Unfortunately I haven't yet found a VBB cancelled trip in some other source with which I could confirm this issue, but I have found one with skipped stops (from 2025-01-12T14%3A18%3A01%2B01%3A00.gtfs-rt.pbf):

Excerpt from feed

{"id":"3197251471.329042","trip_update":{"trip":{"trip_id":"252167676","start_date":"20250112","route_id":"17368_700","direction_id":0},"stop_time_update":[
{"stop_sequence":0,"arrival":{"time":{"low":1736686020,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686020,"high":0,"unsigned":false}},"stop_id":"de:11000:900152504::1"},
{"stop_sequence":1,"arrival":{"time":{"low":1736686050,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686050,"high":0,"unsigned":false}},"stop_id":"de:11000:900152504::2"},
{"stop_sequence":2,"arrival":{"time":{"low":1736686080,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686080,"high":0,"unsigned":false}},"stop_id":"de:11000:900152004::1"},
{"stop_sequence":3,"arrival":{"time":{"low":1736686140,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686140,"high":0,"unsigned":false}},"stop_id":"de:11000:900152511::2"},
{"stop_sequence":4,"arrival":{"time":{"low":1736686200,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686200,"high":0,"unsigned":false}},"stop_id":"de:11000:900152005::2"},
{"stop_sequence":5,"arrival":{"time":{"low":1736686320,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686320,"high":0,"unsigned":false}},"stop_id":"de:11000:900152506::2"},
{"stop_sequence":6,"arrival":{"time":{"low":1736686380,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686380,"high":0,"unsigned":false}},"stop_id":"de:11000:900152507::2"},
{"stop_sequence":7,"arrival":{"time":{"low":1736686440,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686440,"high":0,"unsigned":false}},"stop_id":"de:11000:900151001::2"},
{"stop_sequence":8,"arrival":{"time":{"low":1736686500,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686500,"high":0,"unsigned":false}},"stop_id":"de:11000:900151002::2"},
{"stop_sequence":9,"arrival":{"time":{"low":1736686560,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686560,"high":0,"unsigned":false}},"stop_id":"de:11000:900151008::2"},
{"stop_sequence":10,"arrival":{"time":{"low":1736686680,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686680,"high":0,"unsigned":false}},"stop_id":"de:11000:900152001::2"},
{"stop_sequence":11,"arrival":{"time":{"low":1736686800,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686800,"high":0,"unsigned":false}},"stop_id":"de:11000:900151006::7"},
{"stop_sequence":12,"arrival":{"time":{"low":1736686860,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686860,"high":0,"unsigned":false}},"stop_id":"de:11000:900150002::1"},
{"stop_sequence":13,"arrival":{"delay":2,"time":{"low":1736686922,"high":0,"unsigned":false}},"departure":{"delay":2,"time":{"low":1736686922,"high":0,"unsigned":false}},"stop_id":"de:11000:900150052::1"},
{"stop_sequence":14,"arrival":{"time":{"low":1736686980,"high":0,"unsigned":false}},"departure":{"time":{"low":1736686980,"high":0,"unsigned":false}},"stop_id":"de:11000:900150053::1"},
{"stop_sequence":15,"arrival":{"delay":2,"time":{"low":1736687102,"high":0,"unsigned":false}},"departure":{"delay":2,"time":{"low":1736687102,"high":0,"unsigned":false}},"stop_id":"de:11000:900150504::3"},
{"stop_sequence":16,"arrival":{"time":{"low":1736687220,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687220,"high":0,"unsigned":false}},"stop_id":"de:11000:900150020::1"},
{"stop_sequence":17,"arrival":{"time":{"low":1736687280,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687280,"high":0,"unsigned":false}},"stop_id":"de:11000:900150051::2"},
{"stop_sequence":18,"arrival":{"time":{"low":1736687340,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687340,"high":0,"unsigned":false}},"stop_id":"de:11000:900150050::1"},
{"stop_sequence":19,"arrival":{"time":{"low":1736687400,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687400,"high":0,"unsigned":false}},"stop_id":"de:11000:900150530::1"},
{"stop_sequence":20,"arrival":{"time":{"low":1736687460,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687460,"high":0,"unsigned":false}},"stop_id":"de:11000:900150531::1"},
{"stop_sequence":21,"arrival":{"time":{"low":1736687520,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687520,"high":0,"unsigned":false}},"stop_id":"de:11000:900150523::2"},
{"stop_sequence":22,"arrival":{"time":{"low":1736687580,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687580,"high":0,"unsigned":false}},"stop_id":"de:11000:900150532::1"},
{"stop_sequence":23,"arrival":{"time":{"low":1736687640,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687640,"high":0,"unsigned":false}},"stop_id":"de:11000:900160505::1"},
{"stop_sequence":24,"arrival":{"time":{"low":1736687700,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687700,"high":0,"unsigned":false}},"stop_id":"de:11000:900160012::2"},
{"stop_sequence":25,"arrival":{"time":{"low":1736687760,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687760,"high":0,"unsigned":false}},"stop_id":"de:11000:900160521::3"},
{"stop_sequence":26,"arrival":{"time":{"low":1736687820,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687820,"high":0,"unsigned":false}},"stop_id":"de:11000:900160522::2"},
{"stop_sequence":27,"arrival":{"time":{"low":1736687850,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687850,"high":0,"unsigned":false}},"stop_id":"de:11000:900160523::1"},
{"stop_sequence":28,"arrival":{"time":{"low":1736687880,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687880,"high":0,"unsigned":false}},"stop_id":"de:11000:900160526::1"},
{"stop_sequence":29,"arrival":{"time":{"low":1736687940,"high":0,"unsigned":false}},"departure":{"time":{"low":1736687940,"high":0,"unsigned":false}},"stop_id":"de:11000:900160020::1"},
{"stop_sequence":30,"arrival":{"time":{"low":1736688000,"high":0,"unsigned":false}},"departure":{"time":{"low":1736688000,"high":0,"unsigned":false}},"stop_id":"de:11000:900160549::1"},
{"stop_sequence":31,"arrival":{"time":{"low":1736688060,"high":0,"unsigned":false}},"departure":{"time":{"low":1736688060,"high":0,"unsigned":false}},"stop_id":"de:11000:900160524::1"},
{"stop_sequence":32,"arrival":{"time":{"low":1736688120,"high":0,"unsigned":false}},"departure":{"time":{"low":1736688120,"high":0,"unsigned":false}},"stop_id":"de:11000:900160540::1"}
]}}

Where all stops after de:11000:900160522::2/Betriebshof Lichtenberg (Berlin) should be skipped according to DB – see screenshot.

Not sure about the skipped stops, but for the cancelled trips, this PR might be related, which should fix too short ttls for cancelled trips. However, even then, I would expect cancelled trips to appear at least very shortly (for five minutes) in the feed.

[derhuerst]

I have never seen any cancelled trip in the feed. While I may of course have overlooked them (or VBB is just so reliable that there are no cancelled trips) I think this is suspicious.

Definitely, as in a network the size of the VBB there will likely be cancellations every day!

There are also no skipped stops (schedule_relationship 1), even though there are multiple disruptions today, e.g. M13 being diverted between Möllendorffstr./Storkower Str. and Warschauer Str. and Bus 240 between Betriebhof Lichtenberg and S+U Lichtenberg.

Unforunately I don't have realtime data from back then, so this specific case is hard to investigate. Instead, I have picked data from today (2025-02-06).

---

Note that, in general, the GTFS Realtime feed can only provide updates to what the GTFS Schedule feed specifies.

Upon further investigation, I have decided to differentiate planned disturbances (e.g. interruptions due to construction work) and unplanned disturbances (e.g. cancellations due to medical emergencies, crowding, etc.).

interruptions due to construction work

• If, due to construction work, the GTFS Schedule splits a trip (that's usually running as one) into two "pieces", the VDV-454 realtime data can only be matched against each of those two separately.
• In case the realtime data does not split the trip, with the current logic, it will only ever be matched with one schedule trip "instance". This means that
  • we cannot provide realtime data for the other half's schedule trip "instance".
  • we can either
    • just discard the additional (now superfluous) realtime IstHalts/stop_times – which is a problem with trips that do have a new unscheduled IstHalt/stop_time – or
    • express them as schedule_relationship: ADDED – which very misleading (and technically wrong) in the case of interruptions

complex 2025-02-06 example: interruption of M27 & 255 at S Wollankstr.

Behold, this is a very complex example involving

• the interruption of two lines because of construction work,
• replacement service with through service and loops,
• depot stops before the "main" first stops,
• different & partially wrong modelling/behaviour in GTFS Schedule, VDV-453/-454, HAFAS, and on the BVG website.

Let's break it down:

• There is construction work going on at S Wollankstr. (de:11000:900130003).
• The outbound M27, which usually runs between S+U Jungfernheide (de:11000:900020201) and Hadlichstr. (de:11000:900130005, depot stop after S+U Pankow de:11000:900130002), is interrupted:
  • One half runs until St.-Elisabeth-Kirchhof (de:11000:900006153, usually one before S+U Wollankstr.), then as a through service (a.k.a. in-seat transfer) as 255 towards U Osloer Str. (de:11000:900009202).
  • The other half runs from Wilhelm-Kuhr-Str. (de:11000:900130504, one before Wollankstr./Florastr. de:11000:900130019, which in turn is close to the original stop Pradelstr. de:11000:900130523) towards Hadlichstr. (one behind S+U Pankow). However, it already came from a through service as 255 starting at Schwarzelfenweg (de:11000:900144001::1, the depot stop before Darßler Str./Roelckestr. de:11000:900144001) towards Wilhelm-Kuhr-Str.

info on the BVG website

BVG disruption info

split itinerary in the BVG routing app

western M27/255 trip in the BVG routing app

eastern M27/255 trip in the BVG routing app

M27 PDF line plan

M27_2024-12-15.pdf

255 PDF line plan

255_2024-12-15.pdf

GTFS Schedule data

The 2025-01-30 GTFS data contains the following trips:

255 St.-Elisabeth-Kirchhof -> U Osloer Str.

route_id,route_short_name,trip_id,trip_headsign,stop_sequence_consec,t_arrival,t_departure,stop_id,stop_name,station_id
17367_700,255,253708224,U Osloer Str. (Berlin),0,2025-02-06 14:17:00+01,2025-02-06 14:17:00+01,de:11000:900006153::2,St.-Elisabeth-Kirchhof (Berlin),
17367_700,255,253708224,U Osloer Str. (Berlin),1,2025-02-06 14:21:00+01,2025-02-06 14:21:00+01,de:11000:900130003::1,S Wollankstr. (Berlin),
17367_700,255,253708224,U Osloer Str. (Berlin),2,2025-02-06 14:22:00+01,2025-02-06 14:22:00+01,de:11000:900006100::1,S Wollankstr./Sternstr. (Berlin),
17367_700,255,253708224,U Osloer Str. (Berlin),3,2025-02-06 14:24:00+01,2025-02-06 14:24:00+01,de:11000:900006105::1,Verlängerte Koloniestr. (Berlin),
17367_700,255,253708224,U Osloer Str. (Berlin),4,2025-02-06 14:27:00+01,2025-02-06 14:27:00+01,de:11000:900085206::1,Papierstr. (Berlin),
17367_700,255,253708224,U Osloer Str. (Berlin),5,2025-02-06 14:28:00+01,2025-02-06 14:28:00+01,de:11000:900009254::2,Ritterlandweg/Soldiner Str. (Berlin),
17367_700,255,253708224,U Osloer Str. (Berlin),6,2025-02-06 14:29:00+01,2025-02-06 14:29:00+01,de:11000:900009206::1,Drontheimer Str. (Berlin),
17367_700,255,253708224,U Osloer Str. (Berlin),7,2025-02-06 14:30:00+01,2025-02-06 14:30:00+01,de:11000:900009202::8,U Osloer Str. (Berlin),
17367_700,255,253708224,U Osloer Str. (Berlin),8,2025-02-06 14:32:00+01,2025-02-06 14:32:00+01,de:11000:900009202::9,U Osloer Str. (Berlin),

255 Schwarzelfenweg -> Wilhelm-Kuhr-Str.

route_id,route_short_name,trip_id,trip_headsign,stop_sequence_consec,t_arrival,t_departure,stop_id,stop_name,station_id
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),0,2025-02-06 13:35:00+01,2025-02-06 13:35:00+01,de:11000:900144001::1,Schwarzelfenweg (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),1,2025-02-06 13:35:30+01,2025-02-06 13:35:30+01,de:11000:900144001::2,Darßer Str./Roelckestr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),2,2025-02-06 13:36:00+01,2025-02-06 13:36:00+01,de:11000:900140512::1,Roelckestr./Nüßlerstr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),3,2025-02-06 13:37:00+01,2025-02-06 13:37:00+01,de:11000:900140513::1,Nüßlerstr./Feldtmannstr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),4,2025-02-06 13:38:00+01,2025-02-06 13:38:00+01,de:11000:900140514::1,Gehringstr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),5,2025-02-06 13:39:00+01,2025-02-06 13:39:00+01,de:11000:900140018::3,Rathaus Weißensee (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),6,2025-02-06 13:40:00+01,2025-02-06 13:40:00+01,de:11000:900140013::6,Berliner Allee/Rennbahnstr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),7,2025-02-06 13:41:00+01,2025-02-06 13:41:00+01,de:11000:900140006::1,Weißer See (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),8,2025-02-06 13:43:00+01,2025-02-06 13:43:00+01,de:11000:900140005::1,"Berlin, Albertinenstr.",
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),9,2025-02-06 13:44:00+01,2025-02-06 13:44:00+01,de:11000:900140507::1,Woelckpromenade (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),10,2025-02-06 13:45:00+01,2025-02-06 13:45:00+01,de:11000:900140019::1,Mirbachplatz (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),11,2025-02-06 13:46:00+01,2025-02-06 13:46:00+01,de:11000:900140016::1,Roelckestr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),12,2025-02-06 13:48:00+01,2025-02-06 13:48:00+01,de:11000:900140009::3,Hamburger Platz (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),13,2025-02-06 13:49:00+01,2025-02-06 13:49:00+01,de:11000:900140503::1,Heinersdorfer Str./Am Steinberg (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),14,2025-02-06 13:51:00+01,2025-02-06 13:51:00+01,de:11000:900141507::2,Prenzlauer Promenade/Am Steinberg (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),15,2025-02-06 13:53:00+01,2025-02-06 13:53:00+01,de:11000:900130518::1,Treskowstr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),16,2025-02-06 13:54:00+01,2025-02-06 13:54:00+01,de:11000:900130517::1,Binzstr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),17,2025-02-06 13:56:00+01,2025-02-06 13:56:00+01,de:11000:900130015::2,Prenzlauer Prom./Kissingenstr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),18,2025-02-06 13:57:00+01,2025-02-06 13:57:00+01,de:11000:900130509::1,Kissingenplatz (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),19,2025-02-06 13:58:00+01,2025-02-06 13:58:00+01,de:11000:900130505::2,Neumannstr./Kissingenstr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),20,2025-02-06 13:59:00+01,2025-02-06 13:59:00+01,de:11000:900130519::2,Lohmestr. (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),21,2025-02-06 14:01:00+01,2025-02-06 14:01:00+01,de:11000:900130002::3,S+U Pankow (Berlin),de:11000:900130002
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),22,2025-02-06 14:03:00+01,2025-02-06 14:03:00+01,de:11000:900130013::1,Pankow Kirche (Berlin),
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),23,2025-02-06 14:05:00+01,2025-02-06 14:05:00+01,de:11000:900130501::1,"Berlin, Rathaus Pankow",de:11000:900130501
17367_700,255,253708521,Wilhelm-Kuhr-Str. (Berlin),24,2025-02-06 14:06:00+01,2025-02-06 14:06:00+01,de:11000:900130504::2,Wilhelm-Kuhr-Str. (Berlin),

M27 S+U Jungfernheide -> St.-Elisabeth-Kirchhof

route_id,route_short_name,trip_id,trip_headsign,stop_sequence_consec,t_arrival,t_departure,stop_id,stop_name,station_id
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),0,2025-02-06 13:31:00+01,2025-02-06 13:31:00+01,de:11000:900020201::6,S+U Jungfernheide Bhf (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),1,2025-02-06 13:32:00+01,2025-02-06 13:32:00+01,de:11000:900020201::4,S+U Jungfernheide Bhf (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),2,2025-02-06 13:35:00+01,2025-02-06 13:35:00+01,de:11000:900019204::3,U Mierendorffplatz (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),3,2025-02-06 13:36:00+01,2025-02-06 13:36:00+01,de:11000:900001154::1,Ilsenburger Str. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),4,2025-02-06 13:37:00+01,2025-02-06 13:37:00+01,de:11000:900001155::2,Goslarer Platz (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),5,2025-02-06 13:39:00+01,2025-02-06 13:39:00+01,de:11000:900001152::2,Neues Ufer (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),6,2025-02-06 13:40:00+01,2025-02-06 13:40:00+01,de:11000:900001103::1,Wiebestr./Huttenstr. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),7,2025-02-06 13:41:00+01,2025-02-06 13:41:00+01,de:11000:900001151::2,Reuchlinstr. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),8,2025-02-06 13:43:00+01,2025-02-06 13:43:00+01,de:11000:900002102::3,"Berlin, Turmstr./Beusselstr.",
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),9,2025-02-06 13:45:00+01,2025-02-06 13:45:00+01,de:11000:900003155::1,Rathaus Tiergarten (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),10,2025-02-06 13:47:00+01,2025-02-06 13:47:00+01,de:11000:900003104::9,U Turmstr. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),11,2025-02-06 13:49:00+01,2025-02-06 13:49:00+01,de:11000:900002205::1,Lübecker Str. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),12,2025-02-06 13:50:00+01,2025-02-06 13:50:00+01,de:11000:900002202::1,Wilsnacker Str. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),13,2025-02-06 13:51:00+01,2025-02-06 13:51:00+01,de:11000:900002206::5,Kriminalgericht Moabit (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),14,2025-02-06 13:53:00+01,2025-02-06 13:53:00+01,de:11000:900002254::2,Birkenstr./Rathenower Str. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),15,2025-02-06 13:54:00+01,2025-02-06 13:54:00+01,de:11000:900002231::1,Kruppstr./Rathenower Str. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),16,2025-02-06 13:56:00+01,2025-02-06 13:56:00+01,de:11000:900002257::3,"Berlin, Kruppstraße",
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),17,2025-02-06 13:57:00+01,2025-02-06 13:57:00+01,de:11000:900002204::1,Perleberger Brücke (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),18,2025-02-06 14:00:00+01,2025-02-06 14:00:00+01,de:11000:900001202::2,Am Nordhafen (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),19,2025-02-06 14:04:00+01,2025-02-06 14:04:00+01,de:11000:900008104::3,U Reinickendorfer Str. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),20,2025-02-06 14:05:00+01,2025-02-06 14:05:00+01,de:11000:900008103::4,"Berlin, Nettelbeckplatz/S Wedding",
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),21,2025-02-06 14:07:00+01,2025-02-06 14:07:00+01,de:11000:900008153::2,Wiesenstr. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),22,2025-02-06 14:09:00+01,2025-02-06 14:09:00+01,de:11000:900008106::2,Brunnenplatz (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),23,2025-02-06 14:12:00+01,2025-02-06 14:12:00+01,de:11000:900009203::3,U Pankstr. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),24,2025-02-06 14:13:00+01,2025-02-06 14:13:00+01,de:11000:900009204::2,"Berlin, Osloer Str./Prinzenallee",
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),25,2025-02-06 14:16:00+01,2025-02-06 14:16:00+01,de:11000:900006102::3,Prinzenallee/Soldiner Str. (Berlin),
17448_700,M27,253732734,St.-Elisabeth-Kirchhof (Berlin),26,2025-02-06 14:17:00+01,2025-02-06 14:17:00+01,de:11000:900006153::2,St.-Elisabeth-Kirchhof (Berlin),

M27 Wilhelm-Kuhr-Str. -> Hadlichstr.

route_id,route_short_name,trip_id,trip_headsign,stop_sequence_consec,t_arrival,t_departure,stop_id,stop_name,station_id
17448_700,M27,253732361,Hadlichstr. (Berlin),0,2025-02-06 14:06:00+01,2025-02-06 14:06:00+01,de:11000:900130504::2,Wilhelm-Kuhr-Str. (Berlin),
17448_700,M27,253732361,Hadlichstr. (Berlin),1,2025-02-06 14:08:00+01,2025-02-06 14:08:00+01,de:11000:900130019::2,Wollankstr./Florastr. (Berlin),
17448_700,M27,253732361,Hadlichstr. (Berlin),2,2025-02-06 14:09:00+01,2025-02-06 14:09:00+01,de:11000:900130516::1,Gaillardstr. (Berlin),
17448_700,M27,253732361,Hadlichstr. (Berlin),3,2025-02-06 14:10:00+01,2025-02-06 14:10:00+01,de:11000:900130515::1,Görschstr. (Berlin),
17448_700,M27,253732361,Hadlichstr. (Berlin),4,2025-02-06 14:12:00+01,2025-02-06 14:12:00+01,de:11000:900130018::2,Mühlenstr. (Berlin),
17448_700,M27,253732361,Hadlichstr. (Berlin),5,2025-02-06 14:15:00+01,2025-02-06 14:15:00+01,de:11000:900130002::5,S+U Pankow (Berlin),
17448_700,M27,253732361,Hadlichstr. (Berlin),6,2025-02-06 14:17:00+01,2025-02-06 14:17:00+01,de:11000:900130005::3,Hadlichstr. (Berlin),
17448_700,M27,253732361,Hadlichstr. (Berlin),7,2025-02-06 14:17:00+01,2025-02-06 14:17:00+01,de:11000:900130005::1,Hadlichstr. (Berlin),

• Schwarzelfenweg (de:11000:900144001::1) not modelled as a separate station, but rather as a sub-stop of Darßler Str./Roelckestr. (de:11000:900144001).
• The through service between M27/255 (west of Wollankstr.) and 255/M27 (east of Wollankstr.) is not modelled explicitly even though GTFS Schedule allows specifying in-seat transfers using transfer_type=4.
• The GTFS Schedule trip 253708224 (line 255) stops a S Wollankstr. (de:11000:900130003::1), even though BVG's M27 remark says "Bus M27: Aufgrund von Bauarbeiten bitte an S Wollankstraße umsteigen. Abfahrt Richtung S+U Jungfernheide an der Haltestelle S Wollankstraße/Sternstraße.". This is confusing!

TLDR: Some minor issues aside, the schedule data splits 255 & M27 into two parts each, with separate trip_ids but the same route_ids.

VDV-454 realtime data

The realtime data in VBB's Datendrehscheibe contains exactly one IstFahrts that matches the line 255 trip 253708224:

• The IstFahrt with a FahrtID.Fahrtbezeichner of 9464_255_39_8_1_9_1160#BVG has an IstHalt with a HaltID of 900006105 (de:11000:900006105, Verlängerte Koloniestr.) and a Abfahrtszeit of 2025-02-06T13:24:00Z.
• There are multiple pronoses for this IstFahrt, the latest including prognosis for 900006105 is from 2025-02-06T13:26:46.596Z with a IstAbfahrtPrognose of 2025-02-06T13:26:25Z (2m25s delay).
• The IstFahrt contains the same list of stops as in the schedule data, except the last depot at de:11000:900009202::9 (see schedule data above).

Same for the line 255 trip 253708521, the line M27 trip 253732734 and the line M27 trip 253732361.

TLDR: Just like the schedule data, the realtime data splits 255 & M27 into two parts each, and provides realtime updates for them separately. This means that we shouldn't expect any cancelled stops.

unplanned cancellations

example: cancelled U8

Using the VBB HAFAS "live map" (tap "Livekarte & Multi-Mobilität", then activate the toggles in the "Livekarte" section), I have picked a trip that is cancelled:

• starts 19:41:30 at S+U Wittenau
• ends 20:17:30 at S+U Hermannstr.

cancelled U8 in the BVG routing app

The corresponding trip "instance" 248122697 in the GTFS Schedule data:

route_id,route_short_name,trip_id,trip_headsign,stop_sequence_consec,t_arrival,t_departure,stop_id,stop_name,station_id
17525_400,U8,248122697,S+U Hermannstr. (Berlin),0,2025-02-06 19:41:30+01,2025-02-06 19:41:30+01,de:11000:900096101::1,S+U Wittenau (Berlin),de:11000:900096101
17525_400,U8,248122697,S+U Hermannstr. (Berlin),1,2025-02-06 19:43:00+01,2025-02-06 19:43:00+01,de:11000:900096410::1,U Rathaus Reinickendorf (Berlin),de:11000:900096410
17525_400,U8,248122697,S+U Hermannstr. (Berlin),2,2025-02-06 19:45:00+01,2025-02-06 19:45:00+01,de:11000:900096458::1,S+U Karl-Bonhoeffer-Nervenklinik (Berlin),de:11000:900096458
17525_400,U8,248122697,S+U Hermannstr. (Berlin),3,2025-02-06 19:46:30+01,2025-02-06 19:46:30+01,de:11000:900086160::1,U Lindauer Allee (Berlin),de:11000:900086160
17525_400,U8,248122697,S+U Hermannstr. (Berlin),4,2025-02-06 19:47:30+01,2025-02-06 19:47:30+01,de:11000:900085104::1,U Paracelsus-Bad (Berlin),de:11000:900085104
17525_400,U8,248122697,S+U Hermannstr. (Berlin),5,2025-02-06 19:49:00+01,2025-02-06 19:49:00+01,de:11000:900085203::1,U Residenzstr. (Berlin),de:11000:900085203
17525_400,U8,248122697,S+U Hermannstr. (Berlin),6,2025-02-06 19:50:30+01,2025-02-06 19:50:30+01,de:11000:900085202::1,U Franz-Neumann-Platz (Berlin),de:11000:900085202
17525_400,U8,248122697,S+U Hermannstr. (Berlin),7,2025-02-06 19:52:30+01,2025-02-06 19:52:30+01,de:11000:900009202::1,U Osloer Str. (Berlin),de:11000:900009202
17525_400,U8,248122697,S+U Hermannstr. (Berlin),8,2025-02-06 19:54:00+01,2025-02-06 19:54:00+01,de:11000:900009203::1,U Pankstr. (Berlin),de:11000:900009203
17525_400,U8,248122697,S+U Hermannstr. (Berlin),9,2025-02-06 19:55:30+01,2025-02-06 19:55:30+01,de:11000:900007102::1,S+U Gesundbrunnen Bhf (Berlin),de:11000:900007102
17525_400,U8,248122697,S+U Hermannstr. (Berlin),10,2025-02-06 19:57:00+01,2025-02-06 19:57:00+01,de:11000:900007103::1,U Voltastr. (Berlin),de:11000:900007103
17525_400,U8,248122697,S+U Hermannstr. (Berlin),11,2025-02-06 19:58:30+01,2025-02-06 19:58:30+01,de:11000:900007110::1,U Bernauer Str. (Berlin),de:11000:900007110
17525_400,U8,248122697,S+U Hermannstr. (Berlin),12,2025-02-06 20:00:00+01,2025-02-06 20:00:00+01,de:11000:900100023::1,U Rosenthaler Platz (Berlin),de:11000:900100023
17525_400,U8,248122697,S+U Hermannstr. (Berlin),13,2025-02-06 20:01:30+01,2025-02-06 20:01:30+01,de:11000:900100051::1,U Weinmeisterstr. (Berlin),de:11000:900100051
17525_400,U8,248122697,S+U Hermannstr. (Berlin),14,2025-02-06 20:03:30+01,2025-02-06 20:03:30+01,de:11000:900100003::5,S+U Alexanderplatz Bhf (Berlin),de:11000:900100003
17525_400,U8,248122697,S+U Hermannstr. (Berlin),15,2025-02-06 20:05:00+01,2025-02-06 20:05:00+01,de:11000:900100004::1,S+U Jannowitzbrücke (Berlin),de:11000:900100004
17525_400,U8,248122697,S+U Hermannstr. (Berlin),16,2025-02-06 20:06:30+01,2025-02-06 20:06:30+01,de:11000:900100008::1,U Heinrich-Heine-Str. (Berlin),de:11000:900100008
17525_400,U8,248122697,S+U Hermannstr. (Berlin),17,2025-02-06 20:08:00+01,2025-02-06 20:08:00+01,de:11000:900013101::1,U Moritzplatz (Berlin),de:11000:900013101
17525_400,U8,248122697,S+U Hermannstr. (Berlin),18,2025-02-06 20:10:00+01,2025-02-06 20:10:00+01,de:11000:900013102::3,U Kottbusser Tor (Berlin),de:11000:900013102
17525_400,U8,248122697,S+U Hermannstr. (Berlin),19,2025-02-06 20:11:30+01,2025-02-06 20:11:30+01,de:11000:900016201::1,U Schönleinstr. (Berlin),de:11000:900016201
17525_400,U8,248122697,S+U Hermannstr. (Berlin),20,2025-02-06 20:13:30+01,2025-02-06 20:13:30+01,de:11000:900078101::3,U Hermannplatz (Berlin),de:11000:900078101
17525_400,U8,248122697,S+U Hermannstr. (Berlin),21,2025-02-06 20:15:00+01,2025-02-06 20:15:00+01,de:11000:900079202::1,U Boddinstr. (Berlin),de:11000:900079202
17525_400,U8,248122697,S+U Hermannstr. (Berlin),22,2025-02-06 20:16:30+01,2025-02-06 20:16:30+01,de:11000:900079201::1,U Leinestr. (Berlin),de:11000:900079201
17525_400,U8,248122697,S+U Hermannstr. (Berlin),23,2025-02-06 20:17:30+01,2025-02-06 20:17:30+01,de:11000:900079221::2,S+U Hermannstr. (Berlin),de:11000:900079221

However, there is no corresponding IstFahrt in the VBB Datendrehscheibe, it's just missing. AFAIK (but I'm not sure) this is a limitation of the BVG U-Bahn realtime system, so I'll check another example.

example: entire S7 trip cancelled

cancelled S7 in the BVG routing app

The corresponding GTFS Schedule trip "instance" 247876601:

route_id,route_short_name,trip_id,trip_headsign,stop_sequence_consec,t_arrival,t_departure,stop_id,stop_name,station_id
10163_109,S7,247876601,S Wannsee Bhf (Berlin),0,2025-02-06 21:01:12+01,2025-02-06 21:01:12+01,de:11000:900170004:2:52,S Ahrensfelde Bhf (Berlin),de:11000:900170004
10163_109,S7,247876601,S Wannsee Bhf (Berlin),1,2025-02-06 21:03:18+01,2025-02-06 21:03:48+01,de:11000:900170003:1:51,S Mehrower Allee (Berlin),de:11000:900170003
10163_109,S7,247876601,S Wannsee Bhf (Berlin),2,2025-02-06 21:05:06+01,2025-02-06 21:05:36+01,de:11000:900170002:1:51,S Raoul-Wallenberg-Str. (Berlin),de:11000:900170002
10163_109,S7,247876601,S Wannsee Bhf (Berlin),3,2025-02-06 21:06:54+01,2025-02-06 21:07:24+01,de:11000:900170001:1:51,S Marzahn (Berlin),de:11000:900170001
10163_109,S7,247876601,S Wannsee Bhf (Berlin),4,2025-02-06 21:08:42+01,2025-02-06 21:09:12+01,de:11000:900170005:1:51,S Poelchaustr. (Berlin),de:11000:900170005
10163_109,S7,247876601,S Wannsee Bhf (Berlin),5,2025-02-06 21:10:36+01,2025-02-06 21:11:18+01,de:11000:900171003:1:51,S Springpfuhl (Berlin),de:11000:900171003
10163_109,S7,247876601,S Wannsee Bhf (Berlin),6,2025-02-06 21:13:54+01,2025-02-06 21:14:24+01,de:11000:900171002:1:51,S Friedrichsfelde Ost (Berlin),de:11000:900171002
10163_109,S7,247876601,S Wannsee Bhf (Berlin),7,2025-02-06 21:16:18+01,2025-02-06 21:16:54+01,de:11000:900160004:1:51,S+U Lichtenberg Bhf (Berlin),de:11000:900160004
10163_109,S7,247876601,S Wannsee Bhf (Berlin),8,2025-02-06 21:18:24+01,2025-02-06 21:18:54+01,de:11000:900160003:1:51,S Nöldnerplatz (Berlin),de:11000:900160003
10163_109,S7,247876601,S Wannsee Bhf (Berlin),9,2025-02-06 21:20:36+01,2025-02-06 21:21:24+01,de:11000:900120003:3:55,S Ostkreuz Bhf (Berlin),de:11000:900120003
10163_109,S7,247876601,S Wannsee Bhf (Berlin),10,2025-02-06 21:23:06+01,2025-02-06 21:23:42+01,de:11000:900120004:2:53,S+U Warschauer Str. (Berlin),de:11000:900120004
10163_109,S7,247876601,S Wannsee Bhf (Berlin),11,2025-02-06 21:25:24+01,2025-02-06 21:26:12+01,de:11000:900120005:5:58,S Ostbahnhof (Berlin),de:11000:900120005
10163_109,S7,247876601,S Wannsee Bhf (Berlin),12,2025-02-06 21:27:54+01,2025-02-06 21:28:24+01,de:11000:900100004:1:51,S+U Jannowitzbrücke (Berlin),de:11000:900100004
10163_109,S7,247876601,S Wannsee Bhf (Berlin),13,2025-02-06 21:29:54+01,2025-02-06 21:30:42+01,de:11000:900100003:2:53,S+U Alexanderplatz Bhf (Berlin),de:11000:900100003
10163_109,S7,247876601,S Wannsee Bhf (Berlin),14,2025-02-06 21:31:54+01,2025-02-06 21:32:24+01,de:11000:900100002:1:51,S Hackescher Markt (Berlin),de:11000:900100002
10163_109,S7,247876601,S Wannsee Bhf (Berlin),15,2025-02-06 21:33:54+01,2025-02-06 21:34:42+01,de:11000:900100001:3:55,S+U Friedrichstr. Bhf (Berlin),de:11000:900100001
10163_109,S7,247876601,S Wannsee Bhf (Berlin),16,2025-02-06 21:36:36+01,2025-02-06 21:37:12+01,de:11000:900003201:3:55,S+U Berlin Hauptbahnhof,de:11000:900003201
10163_109,S7,247876601,S Wannsee Bhf (Berlin),17,2025-02-06 21:39:18+01,2025-02-06 21:39:48+01,de:11000:900003102:1:51,S Bellevue (Berlin),de:11000:900003102
10163_109,S7,247876601,S Wannsee Bhf (Berlin),18,2025-02-06 21:41:24+01,2025-02-06 21:41:54+01,de:11000:900003103:1:51,S Tiergarten (Berlin),de:11000:900003103
10163_109,S7,247876601,S Wannsee Bhf (Berlin),19,2025-02-06 21:43:18+01,2025-02-06 21:43:54+01,de:11000:900023201:3:55,S+U Zoologischer Garten Bhf (Berlin),de:11000:900023201
10163_109,S7,247876601,S Wannsee Bhf (Berlin),20,2025-02-06 21:45:18+01,2025-02-06 21:45:48+01,de:11000:900024203:1:51,S Savignyplatz (Berlin),de:11000:900024203
10163_109,S7,247876601,S Wannsee Bhf (Berlin),21,2025-02-06 21:47:18+01,2025-02-06 21:47:48+01,de:11000:900024101:4:57,S Charlottenburg Bhf (Berlin),de:11000:900024101
10163_109,S7,247876601,S Wannsee Bhf (Berlin),22,2025-02-06 21:49:36+01,2025-02-06 21:50:18+01,de:11000:900024102:1:50,S Westkreuz (Berlin),de:11000:900024102
10163_109,S7,247876601,S Wannsee Bhf (Berlin),23,2025-02-06 21:52:48+01,2025-02-06 21:53:18+01,de:11000:900048101:1:50,S Grunewald (Berlin),de:11000:900048101
10163_109,S7,247876601,S Wannsee Bhf (Berlin),24,2025-02-06 22:00:00+01,2025-02-06 22:00:30+01,de:11000:900052201:2:52,S Nikolassee (Berlin),de:11000:900052201
10163_109,S7,247876601,S Wannsee Bhf (Berlin),25,2025-02-06 22:02:24+01,2025-02-06 22:02:24+01,de:11000:900053301:1:50,S Wannsee Bhf (Berlin),de:11000:900053301

From the VDV-454 v2.2.1 spec:

Liegt ein Fahrtausfall vor, kann dies durch das Auskunftssystem über zwei Wege festgestellt werden:
• Die ausgefallene SollFahrt wird im Linienfahrplan nicht übertragen.
• Die ausgefallene SollFahrt wird im Linienfahrplan übertragen und mit "FaelltAus" gekennzeichnet.

vdv-453-client currently doesn't parse FaelltAus, and gtfs-rt-feed doesn't process it. ⚠️

`IstFahrt` with `FahrtID.FahrtBezeichner` of `7610-08-8089188-210100#DB`, as parsed by `vdv-453-client`

{
	"Zst": null,
	"LinienID": "7610",
	"LinienText": "S7",
	"RichtungsID": "Ahrensfelde (S)#Berlin-Wannsee",
	"RichtungsText": null,
	"FahrtID": {
		"FahrtBezeichner": "7610-08-8089188-210100#DB",
		"Betriebstag": "2025-02-06"
	},
	"FahrtStartEnde": {
		"StartHaltID": null,
		"Startzeit": null,
		"EndHaltID": null,
		"Endzeit": null
	},
	"Komplettfahrt": "false",
	"UmlaufID": null,
	"PrognoseMoeglich": "true",
	"FahrzeugTypID": null,
	"ServiceAttributs": [],
	"IstHalts": [
		{
			"HaltID": "900170004",
			"Abfahrtszeit": "2025-02-06T21:01:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "41",
			"Einsteigeverbot": null,
			"Ankunftszeit": null,
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": null,
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900170003",
			"Abfahrtszeit": "2025-02-06T21:03:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "2",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:03:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "2",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900170002",
			"Abfahrtszeit": "2025-02-06T21:05:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "2",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:05:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "2",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900170001",
			"Abfahrtszeit": "2025-02-06T21:07:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "2",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:06:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "2",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900170005",
			"Abfahrtszeit": "2025-02-06T21:09:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "2",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:08:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "2",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900171003",
			"Abfahrtszeit": "2025-02-06T21:11:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "2",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:10:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "2",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900171002",
			"Abfahrtszeit": "2025-02-06T21:14:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "2",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:13:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "2",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900160004",
			"Abfahrtszeit": "2025-02-06T21:16:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "2",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:16:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "2",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900160003",
			"Abfahrtszeit": "2025-02-06T21:18:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "2",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:18:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "2",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900120003",
			"Abfahrtszeit": "2025-02-06T21:21:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "6",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:20:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "6",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900120004",
			"Abfahrtszeit": "2025-02-06T21:23:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "4",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:23:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "4",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900120005",
			"Abfahrtszeit": "2025-02-06T21:26:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "11",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:25:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "11",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900100004",
			"Abfahrtszeit": "2025-02-06T21:28:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "4",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:27:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "4",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900100003",
			"Abfahrtszeit": "2025-02-06T21:30:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "4",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:29:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "4",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900100002",
			"Abfahrtszeit": "2025-02-06T21:32:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "4",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:31:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "4",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900100001",
			"Abfahrtszeit": "2025-02-06T21:34:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "6",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:33:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "6",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900003201",
			"Abfahrtszeit": "2025-02-06T21:37:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "16",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:36:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "16",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900003102",
			"Abfahrtszeit": "2025-02-06T21:39:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "4",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:39:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "4",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900003103",
			"Abfahrtszeit": "2025-02-06T21:41:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "4",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:41:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "4",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900023201",
			"Abfahrtszeit": "2025-02-06T21:43:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "6",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:43:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "6",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900024203",
			"Abfahrtszeit": "2025-02-06T21:45:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "4",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:45:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "4",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900024101",
			"Abfahrtszeit": "2025-02-06T21:47:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "8",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:47:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "8",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900024102",
			"Abfahrtszeit": "2025-02-06T21:50:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "1",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:49:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "1",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900048101",
			"Abfahrtszeit": "2025-02-06T21:53:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "1",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T21:52:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "1",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900052201",
			"Abfahrtszeit": "2025-02-06T22:00:00+01:00",
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": "3",
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T22:00:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "3",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		},
		{
			"HaltID": "900053301",
			"Abfahrtszeit": null,
			"IstAbfahrtPrognose": null,
			"AbfahrtssteigText": null,
			"Einsteigeverbot": null,
			"Ankunftszeit": "2025-02-06T22:02:00+01:00",
			"IstAnkunftPrognose": null,
			"AnkunftssteigText": "1",
			"Aussteigeverbot": null,
			"Durchfahrt": null,
			"Zusatzhalt": null,
			"HinweisText": null
		}
	],
	"$BestaetigungZst": "2025-02-06T18:55:25.501Z"
}

TLDR: The realtime data contains a flag indicating that a trip is cancelled, but it is currently being ignored.

example: individual stops cancelled

Unfortunately I haven't yet found a VBB cancelled trip in some other source with which I could confirm this issue, but I have found one with skipped stops (from 2025-01-12T14%3A18%3A01%2B01%3A00.gtfs-rt.pbf):

Excerpt from feed
Where all stops after de:11000:900160522::2/Betriebshof Lichtenberg (Berlin) should be skipped according to DB – see screenshot.

Unfortunately I don't have the corresponding realtime data anymore. Please let me know in case you stumble over another similar case.

[…] for the cancelled trips, this PR might be related, which should fix too short ttls for cancelled trips. […]

Indeed!

[traines-source]

Sounds complicated... If you're looking for some skipped stops, today according to https://bvg.de, Bus 377 skips Kranoldstr. and apparently also Emser Str. (seen on https://fahrinfo.vbb.de) E.g. the one leaving from S Plänterwald at 12:40 and (not) arriving at Kranoldstr. at 13:02. In the feed, again, all stops seem to have RT data and none is skipped (trip 254370805).

[derhuerst]

Bus 377 skips Kranoldstr. and apparently also Emser Str. (seen on https://fahrinfo.vbb.de) E.g. the one leaving from S Plänterwald at 12:40 and (not) arriving at Kranoldstr. at 13:02.

In order to witness this live, I looked into a later trip "instance" 253718380 of the same route: 377 departing from S Plänterwald (900191002) at 21:04, (not) arriving at Kranoldstr. (900079204) at 21:20.

trip in VBB HAFAS

trip in transitous.org

GTFS Schedule trip "instance"

route_id,route_short_name,trip_id,trip_headsign,stop_sequence_consec,t_arrival,t_departure,stop_id,stop_name,station_id
17409_700,377,253718380,Kranoldstr. (Berlin),0,2025-02-07 21:04:00+01,2025-02-07 21:04:00+01,de:11000:900191002::2,S Plänterwald (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),1,2025-02-07 21:05:00+01,2025-02-07 21:05:00+01,de:11000:900191802::1,S Plänterwald (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),2,2025-02-07 21:06:00+01,2025-02-07 21:06:00+01,de:11000:900191515::2,Dammweg/Bergaustr. (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),3,2025-02-07 21:08:00+01,2025-02-07 21:08:00+01,de:11000:900077104::2,Steinbockstr. (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),4,2025-02-07 21:09:00+01,2025-02-07 21:09:00+01,de:11000:900077102::3,"Berlin, Dammweg/Sonnenallee",
17409_700,377,253718380,Kranoldstr. (Berlin),5,2025-02-07 21:10:00+01,2025-02-07 21:10:00+01,de:11000:900077203::2,Neuköllnische Allee (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),6,2025-02-07 21:11:00+01,2025-02-07 21:11:00+01,de:11000:900077107::1,Grenzallee/Bergiusstr. (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),7,2025-02-07 21:12:00+01,2025-02-07 21:12:00+01,de:11000:900077152::1,Am Oberhafen (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),8,2025-02-07 21:13:00+01,2025-02-07 21:13:00+01,de:11000:900077103::2,Naumburger Str. (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),9,2025-02-07 21:14:00+01,2025-02-07 21:14:00+01,de:11000:900078271::2,Lahnstr./U Neukölln (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),10,2025-02-07 21:15:00+01,2025-02-07 21:15:00+01,de:11000:900079251::1,Eduard-Müller-Platz (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),11,2025-02-07 21:16:00+01,2025-02-07 21:16:00+01,de:11000:900079253::2,Emser Str. (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),12,2025-02-07 21:18:00+01,2025-02-07 21:18:00+01,de:11000:900079221::3,S+U Hermannstr. (Berlin),
17409_700,377,253718380,Kranoldstr. (Berlin),13,2025-02-07 21:20:00+01,2025-02-07 21:20:00+01,de:11000:900079204::1,Kranoldstr. (Berlin),

In the feed, again, all stops seem to have RT data and none is skipped […].

Indeed, that is the case. This is the realtime IstHalt for Emser Str. (900079253), just converted from XML to JSON but otherwise verbatim:

first `IstHalt` for `900079253` with delay prognoses

{
	"$name": "IstHalt",
	"$": {},
	"$text": "",
	"$children": [
		{
			"$name": "HaltID",
			"$": {},
			"$text": "ODEG_900079253",
			"$children": []
		},
		{
			"$name": "Abfahrtszeit",
			"$": {},
			"$text": "2025-02-07T20:16:00Z",
			"$children": []
		},
		{
			"$name": "Ankunftszeit",
			"$": {},
			"$text": "2025-02-07T20:16:00Z",
			"$children": []
		},
		{
			"$name": "IstAbfahrtPrognose",
			"$": {},
			"$text": "2025-02-07T20:19:30Z",
			"$children": []
		},
		{
			"$name": "IstAnkunftPrognose",
			"$": {},
			"$text": "2025-02-07T20:19:30Z",
			"$children": []
		}
	],
	"HaltID": {
		"$name": "HaltID",
		"$": {},
		"$text": "ODEG_900079253",
		"$children": []
	},
	"Abfahrtszeit": {
		"$name": "Abfahrtszeit",
		"$": {},
		"$text": "2025-02-07T20:16:00Z",
		"$children": []
	},
	"Ankunftszeit": {
		"$name": "Ankunftszeit",
		"$": {},
		"$text": "2025-02-07T20:16:00Z",
		"$children": []
	},
	"IstAbfahrtPrognose": {
		"$name": "IstAbfahrtPrognose",
		"$": {},
		"$text": "2025-02-07T20:19:30Z",
		"$children": []
	},
	"IstAnkunftPrognose": {
		"$name": "IstAnkunftPrognose",
		"$": {},
		"$text": "2025-02-07T20:19:30Z",
		"$children": []
	}
}

second `IstHalt` for `900079253` without delay prognosis

{
	"$name": "IstHalt",
	"$": {},
	"$text": "",
	"$children": [
		{
			"$name": "HaltID",
			"$": {},
			"$text": "ODEG_900079253",
			"$children": []
		},
		{
			"$name": "Abfahrtszeit",
			"$": {},
			"$text": "2025-02-07T20:16:00Z",
			"$children": []
		},
		{
			"$name": "Ankunftszeit",
			"$": {},
			"$text": "2025-02-07T20:16:00Z",
			"$children": []
		}
	],
	"HaltID": {
		"$name": "HaltID",
		"$": {},
		"$text": "ODEG_900079253",
		"$children": []
	},
	"Abfahrtszeit": {
		"$name": "Abfahrtszeit",
		"$": {},
		"$text": "2025-02-07T20:16:00Z",
		"$children": []
	},
	"Ankunftszeit": {
		"$name": "Ankunftszeit",
		"$": {},
		"$text": "2025-02-07T20:16:00Z",
		"$children": []
	}
}

TLDR: It first gets a realtime prognosis of 3m30s delay (and no cancellation), then an IstHalt message without realtime data. I'll have to clarify this with VBB & BVG.

[traines-source]

The relevant section in the VDV-454 v2.2.1 spec seems to be 6.1.6 Beispiel "Fahrwegänderung" (p. 140). If I understand correctly, there won't be any field or sth indicating that a stop will be skipped, instead, the entire trip will be transmitted once with Komplettfahrt=true and with the respective stops missing. Not sure what's happening with Emser Str. then (I suppose you had checked that it was actually skipped).