RER NOTE42

RER

PoissyBoissy-Saint-Léger

Passages not confirmedTimes reported by the data source. Passages are not confirmed.

Historical average delay — home ranking

+1.9 min

Average of available delays per run over the 30 days before calculation, with equal weight for each eligible run. This is not the current delay.

Runs used: 7. Calculated on: 9/11/2026, 1:00:25 AM (Europe/Paris).

This average can be available without a complete route. The route statistics below use only recorded routes with their stops.

Calculation window: 8/12/2026, 1:00:25 AM – 9/11/2026, 1:00:25 AM (Europe/Paris).

Runs in the window: 8
Events confirmed by the source: 0
Events predicted by the source: 2
Unknown event type: 5
Cancelled runs, excluded: 0
No usable delay, excluded: 1

Latest source timestamp: 9/10/2026, 6:25:41 PM (Europe/Paris).

Runs are identified within each source. Identities across sources are kept separate without a proven match. Exclusions can overlap.

Latest available run: these times are historical.

Stops on the latest run

Poissy
Departure
Scheduled time17:05
Predicted by the source17:06(+1′)
Achères Grand Cormier
Arrival
Scheduled time17:09
Predicted by the source17:10(+1′)
Departure
Scheduled time17:11
Predicted by the source17:10(-1′)
Maisons-Laffitte
Arrival
Scheduled time17:14
Predicted by the source17:14(0′)
Departure
Scheduled time17:15
Predicted by the source17:14(-1′)
Sartrouville
Arrival
Scheduled time17:16
Predicted by the source17:16(0′)
Departure
Scheduled time17:17
Predicted by the source17:16(-1′)
Houilles - Carrières-sur-Seine
Arrival
Scheduled time17:19
Predicted by the source17:19(0′)
Departure
Scheduled time17:20
Predicted by the source17:20(0′)
Nanterre Préfecture - RER
Arrival
Scheduled time17:24
Predicted by the source17:28(+4′)
Departure
Scheduled time17:26
Predicted by the source17:30(+4′)
La Grande Arche de la Défense
Arrival
Scheduled time17:28
Predicted by the source17:32(+4′)
Departure
Scheduled time17:29
Predicted by the source17:34(+5′)
Charles-de-Gaulle Étoile
Arrival
Scheduled time17:32
Predicted by the source17:36(+4′)
Departure
Scheduled time17:33
Predicted by the source17:38(+5′)
Auber
Arrival
Scheduled time17:36
Predicted by the source17:41(+5′)
Departure
Scheduled time17:36
Predicted by the source17:43(+7′)
Châtelet les Halles
Arrival
Scheduled time17:39
Predicted by the source17:44(+5′)
Departure
Scheduled time17:39
Predicted by the source17:47(+8′)
Paris Gare de Lyon
Arrival
Scheduled time17:42
Predicted by the source17:49(+7′)
Departure
Scheduled time17:43
Predicted by the source17:51(+8′)
Nation
Arrival
Scheduled time17:45
Predicted by the source17:52(+7′)
Departure
Scheduled time17:46
Predicted by the source17:53(+7′)
Vincennes
Arrival
Scheduled time17:48
Predicted by the source17:55(+7′)
Departure
Scheduled time17:49
Predicted by the source17:57(+8′)
Fontenay-sous-Bois
Arrival
Scheduled time17:51
Predicted by the source17:58(+7′)
Departure
Scheduled time17:52
Predicted by the source18:00(+8′)
Nogent-sur-Marne
Arrival
Scheduled time17:53
Predicted by the source18:00(+7′)
Departure
Scheduled time17:54
Predicted by the source18:02(+8′)
Joinville-le-Pont
Arrival
Scheduled time17:55
Predicted by the source18:03(+8′)
Departure
Scheduled time17:56
Predicted by the source18:04(+8′)
Saint-Maur-des-Fossés - Créteil
Arrival
Scheduled time17:58
Predicted by the source18:05(+7′)
Departure
Scheduled time17:58
Predicted by the source18:06(+8′)
Le Parc de Saint-Maur RER
Arrival
Scheduled time18:00
Predicted by the source18:07(+7′)
Departure
Scheduled time18:00
Predicted by the source18:08(+8′)
Champigny
Arrival
Scheduled time18:02
Predicted by the source18:09(+7′)
Departure
Scheduled time18:03
Predicted by the source18:10(+7′)
La Varenne Saint-Hilaire - Chennevières-sur-Marne
Arrival
Scheduled time18:04
Predicted by the source18:11(+7′)
Departure
Scheduled time18:05
Predicted by the source18:12(+7′)
Sucy-en-Brie - Bonneuil-sur-Marne
Arrival
Scheduled time18:08
Predicted by the source18:14(+6′)
Departure
Scheduled time18:08
Predicted by the source18:15(+7′)
Boissy-Saint-Léger
Arrival
Scheduled time18:11
Predicted by the source18:19(+8′)

Punctuality of recorded routes

Reported delays per run with a complete route; separate from the ranking sample. A predicted delay does not confirm a passage.

runs reported on time50%

average delay+1.0 min

max delay+8 min

runs reported8

stops22

Delay values

DateDelay (min)

2026-08-271.9523809523809523

2026-08-28-0.19047619047619047

2026-09-031.7727272727272727

2026-09-04-0.4090909090909091

2026-09-070.22727272727272727

2026-09-08-0.4090909090909091

2026-09-09-0.5

2026-09-105.409090909090909

Typical schedule

Stops and times of RER NOTE42 from Poissy to Boissy-Saint-Léger on a typical weekday. Actual times may vary.

StopArrivalDeparture

Poissy—17:05

Achères Grand Cormier17:0917:11

Maisons-Laffitte17:1417:15

Sartrouville17:1617:17

Houilles - Carrières-sur-Seine17:1917:20

Nanterre Préfecture - RER17:2417:26

La Grande Arche de la Défense17:2817:29

Charles-de-Gaulle Étoile17:3217:33

Auber17:3617:36

Châtelet les Halles17:3917:39

Paris Gare de Lyon17:4217:43

Nation17:4517:46

Vincennes17:4817:49

Fontenay-sous-Bois17:5117:52

Nogent-sur-Marne17:5317:54

Joinville-le-Pont17:5517:56

Saint-Maur-des-Fossés - Créteil17:5817:58

Le Parc de Saint-Maur RER18:0018:00

Champigny18:0218:03

La Varenne Saint-Hilaire - Chennevières-sur-Marne18:0418:05

Sucy-en-Brie - Bonneuil-sur-Marne18:0818:08

Boissy-Saint-Léger18:11—

Frequently asked questions

What time does RER NOTE42 depart?

RER NOTE42 departs from Poissy at 17:05 (typical schedule from reported times). Actual times may vary.

How many stops does RER NOTE42 make?

RER NOTE42 connects Poissy to Boissy-Saint-Léger with 22 stops.

Is RER NOTE42 on time?

Over the reported runs, RER NOTE42 was reported on time 50% of runs, with an average delay of 1.0 minutes.

Other trains on this line

Live status and delays for the other trains serving the same stations.

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