Northern 551Y18
View line Northern
Alerts for train 551Y18
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
79%
23/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
76%
63/83 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
+8min
9 in 10 runs arrive with less than this
30 days: +7 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
- Tue 11 Aug Max en route +31 min · last fix heading to 17196 +28 min
- Fri 28 Aug Max en route +16 min · last fix heading to 17196 +12 min
- Sat 19 Sept Max en route +11 min · last fix heading to 17196 +11 min
- Thu 27 Aug Max en route +11 min · last fix heading to 17196 +11 min
- Thu 15 Oct Max en route +12 min · last fix heading to Langley Mill +10 min
Distribution · 90 days
83 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 6% · 5
- On time 70% · 58
- 3–10 min 14% · 12
- 10–30 min 10% · 8
- 30+ min 0% · 0
On-time by weekday
- 85% M n=13
- 85% T n=13
- 77% W n=13
- 67% T n=12
- 92% F n=12
- 50% S n=10
- 70% S n=10
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Wed 28 Oct | Langley Mill 15:25 | +2 min | +6 min |
| Tue 27 Oct | Langley Mill 15:22 | −1 min | +2 min |
| Mon 26 Oct | Langley Mill 15:21 | −1 min | +4 min |
| Sun 25 Oct | Langley Mill 15:27 | +4 min | +8 min |
| Sat 24 Oct | Langley Mill 15:22 | −1 min | +2 min |
| Fri 23 Oct | Langley Mill 15:21 | −1 min | +2 min |
| Thu 22 Oct | Langley Mill 15:21 | −1 min | +1 min |
| Wed 21 Oct | Langley Mill 15:22 | 0 min | +3 min |
| Tue 20 Oct | Langley Mill 15:29 | +7 min | +11 min |
| Mon 19 Oct | Langley Mill 15:23 | +1 min | +6 min |
| Sun 18 Oct | Langley Mill 15:25 | +2 min | +7 min |
| Sat 17 Oct | Langley Mill 15:22 | 0 min | +4 min |
| Fri 16 Oct | Langley Mill 15:23 | +1 min | +5 min |
| Thu 15 Oct | Langley Mill 15:32 | +10 min | +12 min |
| Wed 14 Oct | Langley Mill 15:31 | +8 min | +11 min |
| Tue 13 Oct | Langley Mill 15:24 | +1 min | +6 min |
| Mon 12 Oct | Langley Mill 15:20 | −3 min | — |
| Sun 11 Oct | Langley Mill 15:32 | +10 min | +15 min |
| Sat 10 Oct | Langley Mill 15:23 | +1 min | +5 min |
| Fri 9 Oct | Langley Mill 15:23 | 0 min | +1 min |
| Thu 8 Oct | Langley Mill 15:25 | +2 min | +6 min |
| Wed 7 Oct | Langley Mill 15:22 | −1 min | +1 min |
| Tue 6 Oct | Langley Mill 15:22 | 0 min | +5 min |
| Mon 5 Oct | Langley Mill 15:20 | −3 min | — |
| Sun 4 Oct | 17196 15:25 | +2 min | +7 min |
| Sat 3 Oct | 17196 15:26 | +3 min | +11 min |
| Fri 2 Oct | 17196 15:21 | −1 min | +3 min |
| Thu 1 Oct | 17196 15:22 | −1 min | +3 min |
| Wed 30 Sept | 17196 15:22 | −1 min | +4 min |
| Tue 29 Sept | 17196 15:21 | −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.