GWR 811A17
View line GWR
Alerts for train 811A17
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line GWR.
The mini-map returns when the train runs
On-time · 30 days
54%
13/24 runs under 3 min
RT coverage: 24 full · 0 partial · 0 no data
On-time · 90 days
38%
28/73 runs under 3 min
RT coverage: 73 full · 0 partial · 0 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +2 min
P90
+11min
9 in 10 runs arrive with less than this
30 days: +10 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 14 Sept Max en route +80 min · last fix heading to 73251 +77 min
- Thu 13 Aug Max en route +32 min · last fix heading to 73251 +32 min
- Mon 7 Sept Max en route +26 min · last fix heading to 73251 +23 min
- Tue 27 Oct Max en route +21 min · last fix heading to Slough +18 min
- Sat 3 Oct Max en route +19 min · last fix heading to 73251 +17 min
Distribution · 90 days
73 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 4% · 3
- On time 34% · 25
- 3–10 min 48% · 35
- 10–30 min 11% · 8
- 30+ min 3% · 2
On-time by weekday
- 54% M n=13
- 45% T n=11
- 62% W n=13
- 38% T n=13
- 17% F n=12
- 9% S n=11
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Mon 2 Nov | Slough 12:37 | +1 min | +6 min |
| Sat 31 Oct | Slough 12:54 | +11 min | +11 min |
| Thu 29 Oct | Maidenhead 12:46 | +2 min | +6 min |
| Wed 28 Oct | Maidenhead 12:43 | −1 min | — |
| Tue 27 Oct | Slough 13:02 | +18 min | +21 min |
| Mon 26 Oct | Slough 12:48 | +4 min | +4 min |
| Sat 24 Oct | Maidenhead 12:52 | +8 min | +8 min |
| Fri 23 Oct | Slough 12:43 | −1 min | — |
| Thu 22 Oct | Slough 12:46 | +2 min | +6 min |
| Wed 21 Oct | Maidenhead 12:46 | +2 min | +3 min |
| Tue 20 Oct | Slough 12:46 | +2 min | +4 min |
| Mon 19 Oct | Maidenhead 12:41 | −3 min | +2 min |
| Sat 17 Oct | Slough 12:48 | +5 min | +6 min |
| Fri 16 Oct | Maidenhead 12:52 | +4 min | +4 min |
| Thu 15 Oct | Slough 12:53 | +3 min | +4 min |
| Wed 14 Oct | Slough 12:48 | −1 min | +2 min |
| Tue 13 Oct | Slough 12:53 | +3 min | +3 min |
| Mon 12 Oct | Slough 12:52 | +5 min | +5 min |
| Sat 10 Oct | Maidenhead 12:58 | +14 min | +15 min |
| Fri 9 Oct | Slough 12:46 | +2 min | +2 min |
| Thu 8 Oct | Slough 12:48 | +4 min | +7 min |
| Wed 7 Oct | Maidenhead 12:46 | +1 min | +5 min |
| Tue 6 Oct | Slough 12:46 | +2 min | +2 min |
| Mon 5 Oct | Maidenhead 12:36 | −1 min | +1 min |
| Sat 3 Oct | 73251 13:00 | +17 min | +19 min |
| Fri 2 Oct | 73251 12:50 | +6 min | +6 min |
| Thu 1 Oct | 73251 12:47 | +3 min | +3 min |
| Wed 30 Sept | 73251 12:48 | +3 min | +5 min |
| Mon 28 Sept | 73251 12:43 | −1 min | +1 min |
| Sat 26 Sept | 73251 12:49 | +5 min | +8 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.