Train NS 4252 Leiden Centraal – Haarlem
It has not run yet today
Last recorded run: Saturday 31 October +3 min
Next service: today 17:20 from Leiden Centraal · Sun 1 Nov
Next departure 17:20 today · Leiden Centraal
On-time · 30 days
88%
15/17 runs under 3 min
RT coverage: 14 full · 3 partial · 10 no data
On-time · 90 days
89%
16/18 runs under 3 min
RT coverage: 15 full · 3 partial · 62 no data
Typical delay
0min
Median at arrival, 90 days
30 days: 0 min
P90
+3min
9 in 10 runs arrive with less than this
30 days: +3 min
Last 30 days
Arrival delay at Haarlem, in minutes. One bar per run.
- On time (<3 min)
- 3–10 min
- 10–30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Thu 8 Oct Max en route +11 min · last fix heading to Voorhout +11 min
- Sat 24 Oct Max en route +4 min · last fix heading to Heemstede-Aerdenhout +4 min
Distribution · 90 days
18 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 89% · 16
- 3–10 min 6% · 1
- 10–30 min 6% · 1
- 30+ min 0% · 0
On-time by weekday
- 100% M n=4
- 100% T n=2
- 100% W n=2
- 50% T n=2
- 100% F n=4
- 67% S n=3
- 100% S n=1
Stops and timetable
Timetable of the latest run from the operator’s GTFS (5 stops).
| Stop | Sched. |
|---|---|
| 17:20 | |
| 17:25 | |
| 17:32 | |
| 17:38 | |
| 17:43 |
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.
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 31 Oct | Heemstede-Aerdenhout 17:55Partial coverage | +3 min | +3 min |
| Fri 30 Oct | Heemstede-Aerdenhout 17:55 | 0 min | — |
| Thu 29 Oct | Heemstede-Aerdenhout 17:52 | 0 min | — |
| Wed 28 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Tue 27 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Mon 26 Oct | Heemstede-Aerdenhout 17:52 | +1 min | — |
| Sun 25 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Sat 24 Oct | Heemstede-Aerdenhout 17:55Partial coverage | +4 min | +4 min |
| Fri 23 Oct | Heemstede-Aerdenhout 17:55 | No data | — |
| Thu 22 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Wed 21 Oct | Heemstede-Aerdenhout 17:52 | 0 min | — |
| Tue 20 Oct | Heemstede-Aerdenhout 17:52 | 0 min | — |
| Mon 19 Oct | Heemstede-Aerdenhout 17:52 | 0 min | — |
| Sun 18 Oct | Heemstede-Aerdenhout 17:53Partial coverage | 0 min | — |
| Sat 17 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Fri 16 Oct | Heemstede-Aerdenhout 17:52 | 0 min | — |
| Thu 15 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Wed 14 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Tue 13 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Mon 12 Oct | Heemstede-Aerdenhout 17:52 | 0 min | — |
| Fri 9 Oct | Heemstede-Aerdenhout 17:52 | 0 min | — |
| Thu 8 Oct | Voorhout 18:02 | +11 min | +11 min |
| Wed 7 Oct | Heemstede-Aerdenhout 17:52 | 0 min | — |
| Tue 6 Oct | Heemstede-Aerdenhout 17:52 | +2 min | +3 min |
| Mon 5 Oct | Heemstede-Aerdenhout 17:52 | +1 min | +1 min |
| Sun 4 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Sat 3 Oct | Halfweg-Zwanenburg 00:17 | +1 min | +9 min |
| Fri 2 Oct | Heemstede-Aerdenhout 17:52 | No data | — |
| Thu 1 Oct | Heemstede-Aerdenhout 17:53 | No data | — |
| Wed 30 Sept | Heemstede-Aerdenhout 17:52 | No data | — |