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
73%
22/30 runs under 3 min
RT coverage: 30 full · 0 partial · 0 no data
On-time · 90 days
77%
65/84 runs under 3 min
RT coverage: 84 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: 0 min
P90
+6min
9 in 10 runs arrive with less than this
30 days: +8 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
- Mon 26 Oct Max en route +37 min · last fix heading to Langley Mill +36 min
- Wed 16 Sept Max en route +24 min · last fix heading to 17196 +24 min
- Wed 28 Oct Max en route +16 min · last fix heading to Langley Mill +16 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
Distribution · 90 days
84 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 2% · 2
- On time 75% · 63
- 3–10 min 15% · 13
- 10–30 min 6% · 5
- 30+ min 1% · 1
On-time by weekday
- 85% M n=13
- 69% T n=13
- 69% W n=13
- 92% T n=13
- 85% F n=13
- 78% S n=9
- 60% S n=10
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 30 Oct | Langley Mill 16:27 | +5 min | +11 min |
| Thu 29 Oct | Langley Mill 16:23 | 0 min | +3 min |
| Wed 28 Oct | Langley Mill 16:38 | +16 min | +16 min |
| Tue 27 Oct | Langley Mill 16:22 | −1 min | +2 min |
| Mon 26 Oct | Langley Mill 16:58 | +36 min | +37 min |
| Sun 25 Oct | Langley Mill 15:23 | +4 min | +5 min |
| Sat 24 Oct | Langley Mill 16:27 | +4 min | +6 min |
| Fri 23 Oct | — 16:16 | 0 min | +1 min |
| Thu 22 Oct | Langley Mill 16:23 | +1 min | +2 min |
| Wed 21 Oct | — 16:21 | −1 min | +6 min |
| 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 |
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.