Northern 551Y20
View line Northern
Alerts for train 551Y20
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line Northern.
The mini-map returns when the train runs
On-time · 30 days
86%
25/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
80%
66/83 runs under 3 min
RT coverage: 83 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: 0 min
P90
+5min
9 in 10 runs arrive with less than this
30 days: +5 min
Last 30 days
Delay at the end of each run, in minutes. One bar per run.
- On time (<3 min)
- 3–10 min
- 10–30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Thu 30 Jul Max en route +31 min · last fix heading to 17196 +31 min
- Wed 16 Sept Max en route +24 min · last fix heading to 17196 +24 min
- Tue 1 Sept Max en route +16 min · last fix heading to 17196 +14 min
- Sun 11 Oct Max en route +20 min · last fix heading to Langley Mill +12 min
- Wed 19 Aug Max en route +17 min · last fix heading to 17196 +12 min
Distribution · 90 days
83 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 2% · 2
- On time 77% · 64
- 3–10 min 14% · 12
- 10–30 min 5% · 4
- 30+ min 1% · 1
On-time by weekday
- 85% M n=13
- 69% T n=13
- 75% W n=12
- 83% T n=12
- 85% F n=13
- 90% S n=10
- 70% S n=10
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Tue 20 Oct | — 16:22 | 0 min | +1 min |
| Mon 19 Oct | Langley Mill 16:23 | 0 min | +1 min |
| Sun 18 Oct | Langley Mill 16:21 | −1 min | — |
| Sat 17 Oct | Langley Mill 16:23 | 0 min | +3 min |
| Fri 16 Oct | — 16:25 | +2 min | +6 min |
| Thu 15 Oct | — 16:22 | 0 min | +4 min |
| Wed 14 Oct | Langley Mill 16:30 | +7 min | +7 min |
| Tue 13 Oct | Langley Mill 16:27 | +5 min | +5 min |
| Mon 12 Oct | Langley Mill 16:24 | +2 min | +4 min |
| Sun 11 Oct | Langley Mill 16:35 | +12 min | +20 min |
| Sat 10 Oct | Langley Mill 16:21 | −1 min | +4 min |
| Fri 9 Oct | Langley Mill 16:23 | 0 min | +2 min |
| Thu 8 Oct | — 16:21 | −1 min | — |
| Wed 7 Oct | Langley Mill 16:24 | +1 min | +3 min |
| Tue 6 Oct | Langley Mill 16:22 | 0 min | +5 min |
| Mon 5 Oct | Langley Mill 16:22 | −1 min | +1 min |
| Sun 4 Oct | 17196 16:22 | −1 min | +5 min |
| Sat 3 Oct | 17196 16:24 | +1 min | +5 min |
| Fri 2 Oct | 17196 16:21 | −1 min | +2 min |
| Thu 1 Oct | 17196 16:21 | −1 min | +1 min |
| Wed 30 Sept | 17196 16:21 | −2 min | +2 min |
| Tue 29 Sept | 17196 16:21 | −1 min | +1 min |
| Mon 28 Sept | 17196 16:22 | −1 min | +2 min |
| Sun 27 Sept | 17196 19:03 | +5 min | +6 min |
| Sat 26 Sept | 17196 16:21 | −2 min | +2 min |
| Fri 25 Sept | 17196 16:22 | −1 min | +1 min |
| Thu 24 Sept | 17196 16:21 | −1 min | +2 min |
| Wed 23 Sept | 17196 16:22 | −1 min | +2 min |
| Tue 22 Sept | 17196 16:24 | +2 min | +8 min |
| Mon 21 Sept | 17196 16:24 | +2 min | +2 min |
Each run is closed into train_runs (country, train number, service day) from the live positions. Final delay = last delay seen. Partial coverage: the feed stopped before the final stop (last value used, hatched in the chart). No data: a run without any valid delay; counts as neither on time nor late. Data collected since 11 July 2026.