C4b 20421
View line C4b
Alerts for train 20421
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line C4b.
It does not run today
Last recorded run: Friday 9 October +2 min
The mini-map returns when the train runs
On-time · 30 days
17%
3/18 runs under 3 min
RT coverage: 18 full · 0 partial · 0 no data
On-time · 90 days
8%
4/52 runs under 3 min
RT coverage: 52 full · 0 partial · 0 no data
Typical delay
+14min
Median at arrival, 90 days
30 days: +13 min
P90
+32min
9 in 10 runs arrive with less than this
30 days: +32 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 29 Sept Max en route +99 min · last fix heading to Parla +99 min
- Fri 21 Aug Max en route +99 min · last fix heading to Parla +99 min
- Tue 4 Aug Max en route +65 min · last fix heading to Colmenar Viejo +65 min
- Mon 10 Aug Max en route +37 min · last fix heading to Colmenar Viejo +37 min
- Mon 5 Oct Max en route +35 min · last fix heading to Colmenar Viejo +35 min
Distribution · 90 days
52 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 8% · 4
- 3–10 min 23% · 12
- 10–30 min 54% · 28
- 30+ min 15% · 8
On-time by weekday
- 0% M n=9
- 9% T n=11
- 0% W n=9
- 9% T n=11
- 17% F n=12
- — S n=0
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 9 Oct | Tres Cantos 08:23 | +2 min | +9 min |
| Thu 8 Oct | Colmenar Viejo 08:19 | +28 min | +30 min |
| Wed 7 Oct | Colmenar Viejo 09:18 | +8 min | +10 min |
| Tue 6 Oct | Tres Cantos 07:58 | 0 min | +6 min |
| Mon 5 Oct | Colmenar Viejo 08:28 | +35 min | +35 min |
| Fri 2 Oct | Parla 08:23 | +8 min | +20 min |
| Thu 1 Oct | Colmenar Viejo 08:11 | 0 min | +9 min |
| Tue 29 Sept | Parla 08:23 | +99 min | +99 min |
| Fri 25 Sept | Colmenar Viejo 07:58 | +5 min | +13 min |
| Thu 24 Sept | Colmenar Viejo 08:05 | +11 min | +16 min |
| Wed 23 Sept | Colmenar Viejo 08:14 | +21 min | +27 min |
| Tue 22 Sept | Colmenar Viejo 08:06 | +13 min | +19 min |
| Mon 21 Sept | Colmenar Viejo 08:10 | +17 min | +24 min |
| Fri 18 Sept | Colmenar Viejo 08:06 | +12 min | +16 min |
| Thu 17 Sept | Colmenar Viejo 08:25 | +31 min | +31 min |
| Wed 16 Sept | Parla 08:24 | +26 min | +34 min |
| Tue 15 Sept | Colmenar Viejo 08:12 | +19 min | +24 min |
| Mon 14 Sept | Colmenar Viejo 08:04 | +10 min | +14 min |
| Fri 11 Sept | Colmenar Viejo 08:01 | +8 min | +14 min |
| Thu 10 Sept | Colmenar Viejo 07:59 | +7 min | +11 min |
| Wed 9 Sept | Colmenar Viejo 08:02 | +8 min | +14 min |
| Tue 8 Sept | Colmenar Viejo 08:07 | +14 min | +18 min |
| Mon 7 Sept | Colmenar Viejo 07:57 | +3 min | +11 min |
| Fri 4 Sept | Colmenar Viejo 08:02 | +9 min | +12 min |
| Thu 3 Sept | Colmenar Viejo 08:05 | +12 min | +12 min |
| Wed 2 Sept | Colmenar Viejo 08:05 | +12 min | +18 min |
| Tue 1 Sept | Colmenar Viejo 08:05 | +12 min | +18 min |
| Mon 31 Aug | Colmenar Viejo 07:59 | +6 min | +11 min |
| Fri 28 Aug | Colmenar Viejo 08:13 | +20 min | +20 min |
| Thu 27 Aug | Colmenar Viejo 07:59 | +5 min | +9 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.