Northern 171Y21
View line Northern
Alerts for train 171Y21
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
38%
11/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
46%
41/89 runs under 3 min
RT coverage: 89 full · 0 partial · 0 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +3 min
P90
+11min
9 in 10 runs arrive with less than this
30 days: +13 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
- Sun 25 Oct Max en route +45 min · last fix heading to Ilkeston +45 min
- Sat 22 Aug Max en route +39 min · last fix heading to 25319 +38 min
- Sun 20 Sept Max en route +32 min · last fix heading to 56550 +31 min
- Mon 26 Oct Max en route +20 min · last fix heading to Ilkeston +18 min
- Thu 17 Sept Max en route +17 min · last fix heading to 56550 +17 min
Distribution · 90 days
89 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 46% · 41
- 3–10 min 37% · 33
- 10–30 min 13% · 12
- 30+ min 3% · 3
On-time by weekday
- 38% M n=13
- 23% T n=13
- 50% W n=12
- 58% T n=12
- 54% F n=13
- 62% S n=13
- 38% S n=13
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Tue 3 Nov | Ilkeston 15:57 | −1 min | +1 min |
| Mon 2 Nov | Ilkeston 15:58 | +3 min | +3 min |
| Sun 1 Nov | Ilkeston 16:07 | +2 min | +2 min |
| Sat 31 Oct | Ilkeston 16:07 | −1 min | — |
| Fri 30 Oct | Ilkeston 16:11 | +5 min | +6 min |
| Thu 29 Oct | Ilkeston 16:11 | +5 min | +5 min |
| Wed 28 Oct | Ilkeston 16:19 | +13 min | +13 min |
| Tue 27 Oct | Ilkeston 16:10 | +3 min | +5 min |
| Mon 26 Oct | Ilkeston 16:24 | +18 min | +20 min |
| Sun 25 Oct | Ilkeston 16:51 | +45 min | +45 min |
| Sat 24 Oct | Ilkeston 16:11 | +3 min | +3 min |
| Fri 23 Oct | Ilkeston 16:12 | +5 min | +6 min |
| Thu 22 Oct | Ilkeston 16:09 | +3 min | +3 min |
| Wed 21 Oct | Ilkeston 16:10 | +4 min | +4 min |
| Tue 20 Oct | Ilkeston 16:12 | +6 min | +6 min |
| Mon 19 Oct | Ilkeston 16:05 | −1 min | — |
| Sun 18 Oct | Ilkeston 16:10 | +3 min | +4 min |
| Sat 17 Oct | Ilkeston 16:10 | +2 min | +2 min |
| Fri 16 Oct | Ilkeston 16:14 | +8 min | +8 min |
| Thu 15 Oct | Ilkeston 16:12 | +6 min | +6 min |
| Wed 14 Oct | Ilkeston 16:21 | +15 min | +17 min |
| Tue 13 Oct | Ilkeston 16:09 | +3 min | +3 min |
| Mon 12 Oct | Ilkeston 16:08 | +2 min | +2 min |
| Sun 11 Oct | Ilkeston 16:05 | −1 min | +2 min |
| Sat 10 Oct | Ilkeston 16:07 | 0 min | +1 min |
| Fri 9 Oct | Ilkeston 16:07 | 0 min | +4 min |
| Thu 8 Oct | Ilkeston 16:08 | +2 min | +2 min |
| Wed 7 Oct | Ilkeston 16:12 | +6 min | +7 min |
| Tue 6 Oct | Ilkeston 16:09 | +2 min | +3 min |
| Mon 5 Oct | Ilkeston 16:11 | +5 min | +5 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.