Northern 551Y12
View line Northern
Alerts for train 551Y12
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
77%
23/30 runs under 3 min
RT coverage: 30 full · 0 partial · 0 no data
On-time · 90 days
81%
68/84 runs under 3 min
RT coverage: 84 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: +1 min
P90
+5min
9 in 10 runs arrive with less than this
30 days: +3 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 +33 min · last fix heading to Langley Mill +24 min
- Tue 11 Aug Max en route +16 min · last fix heading to 17196 +16 min
- Sun 13 Sept Max en route +17 min · last fix heading to 17196 +12 min
- Sat 29 Aug Max en route +11 min · last fix heading to 17196 +11 min
- Wed 19 Aug Max en route +10 min · last fix heading to 17196 +10 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 79% · 66
- 3–10 min 13% · 11
- 10–30 min 6% · 5
- 30+ min 0% · 0
On-time by weekday
- 77% M n=13
- 92% T n=13
- 77% W n=13
- 100% T n=13
- 92% F n=12
- 50% S n=10
- 70% S n=10
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Thu 5 Nov | Langley Mill 12:14 | +1 min | +6 min |
| Wed 4 Nov | Langley Mill 12:14 | +1 min | +1 min |
| Tue 3 Nov | Langley Mill 12:14 | +1 min | +1 min |
| Mon 2 Nov | Langley Mill 12:08 | +3 min | +3 min |
| Sun 1 Nov | Langley Mill 12:22 | −1 min | +4 min |
| Sat 31 Oct | Langley Mill 12:21 | −1 min | +2 min |
| Fri 30 Oct | Langley Mill 12:25 | +3 min | +3 min |
| Thu 29 Oct | Langley Mill 12:23 | +1 min | +6 min |
| Wed 28 Oct | Langley Mill 12:32 | +9 min | +12 min |
| Tue 27 Oct | Langley Mill 12:23 | 0 min | +3 min |
| Mon 26 Oct | Langley Mill 12:47 | +24 min | +33 min |
| Sun 25 Oct | — 12:26 | +3 min | +3 min |
| Sat 24 Oct | Langley Mill 12:26 | +3 min | +12 min |
| Fri 23 Oct | Langley Mill 12:22 | −1 min | +2 min |
| Thu 22 Oct | Langley Mill 12:24 | +1 min | +3 min |
| Wed 21 Oct | Langley Mill 12:24 | +2 min | +7 min |
| Tue 20 Oct | Langley Mill 12:21 | −1 min | +4 min |
| Mon 19 Oct | Langley Mill 12:23 | 0 min | +4 min |
| Sun 18 Oct | Langley Mill 11:46 | +1 min | +1 min |
| Sat 17 Oct | Langley Mill 12:26 | +3 min | +4 min |
| Fri 16 Oct | — 12:24 | +1 min | +5 min |
| Thu 15 Oct | Langley Mill 12:25 | +2 min | +3 min |
| Wed 14 Oct | Langley Mill 12:22 | −1 min | +2 min |
| Tue 13 Oct | Langley Mill 12:21 | −1 min | +3 min |
| Mon 12 Oct | Langley Mill 12:24 | +1 min | +8 min |
| Sun 11 Oct | Langley Mill 12:22 | −1 min | +2 min |
| Sat 10 Oct | Langley Mill 12:23 | +1 min | +8 min |
| Fri 9 Oct | Langley Mill 12:25 | +2 min | +6 min |
| Thu 8 Oct | Langley Mill 12:20 | −2 min | +5 min |
| Wed 7 Oct | Langley Mill 12:22 | −1 min | +3 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.