Works in the north-west sector of Île-de-France: disruptions and alternative routes

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On this page, find the details by period of disruptions related to the work in the northwest sector, as well as the alternative routes to choose to get around.

Île-de-France has been divided into 5 sectors (South, East, Centre, North-East and North-West) to better understand the impact of disruptions on the public transport network on a regional scale. During the different periods, alternative routes may save time compared to the usual alternative route.

To simplify your travels

One month before the start of the work, the Île-de-France Mobilités route planner (available on our website and smartphone application) will take into account closures and disruptions and will allow you to anticipate your journeys.

Closure for works and alternative routes: the recap by period

Work information from 1 to 10 July 2026

Reminder of closures

Map of closed sections

From 1 to 10 July 2026:

  • The T1 tramway is interrupted from Asnières – Quatre Routes to Gare de Saint-Denis.
  • Metro line 12 is completely closed from 10 p.m. on July 1, 5, 8 and 9.

Work information from 11 to 12 July 2026

Reminder of closures

Map representing closed lines

From 11 to 12 July 2026:

  • Line H is closed from Ermont – Eaubonne to Epinay – Villetaneuse.
  • The T1 tramway is interrupted from Asnières – Quatre Routes to Gare de Saint-Denis.

Work information from 13 to 14 July 2026

Reminder of closures

Map representing closed lines

From 13 to 14 July 2026:

  • Line H is closed from Ermont – Eaubonne to Epinay – Villetaneuse.
  • The T1 tramway is interrupted from Asnières – Quatre Routes to Gare de Saint-Denis.
  • The T2 tramway is interrupted from Charlebourg to Puteaux.

Work information on 15 July 2026

1. Reminder of closures

Map representing closed lines

July 15, 2026:

  • The RER C is interrupted from Gare d'Austerlitz to Pontoise, as well as from Gare d'Austerlitz to Versailles Château Rive Gauche and Saint-Quentin-en-Yvelines.
  • Line H is closed from Ermont – Eaubonne to Epinay – Villetaneuse.
  • Metro 12 is closed from Concorde to Jules Joffrin.
  • The T1 tramway was interrupted from Asnières – Quatre Routes to La Courneuve – 8 May 1945.
  • The T2 tramway is interrupted from Charlebourg to Puteaux.

2. Alternative routes to take during the period

Map of recommended alternative routes
The replacement bus for line H is direct between Ermont - Eaubonne and Épinay - Villetaneuse. To reach the intermediate stations, please take the regular bus lines 1515 and 1514.

To get to Paris from Pontoise and Saint-Ouen L'Aumône stations:

  • Take line J from Pontoise to Paris Saint-Lazare

 

To go to Paris from the stations of Saint-Ouen L'Aumône – Liesse, Pierrelaye, Montigny-Beauchamp, Franconville – Le Plessis-Bouchard and Cernay:

  • Take line H at these stations to Ermont – Eaubonne and then line J to Paris Saint-Lazare.

 

To go to Paris from Ermont – Eaubonne station:

  • Take the J line to Paris Saint-Lazare
  • Or take the replacement bus of line H (direct shuttle) to Epinay – Villetaneuse and then line H to Gare du Nord.

The replacement bus for line H is direct between Ermont – Eaubonne and Epinay – Villetaneuse. To reach the intermediate stations (Champ de courses d'Enghien, Enghien-les-Bains and La Barre – Ormesson), take the regular bus lines 1515 and 1514.

To get to Paris from Saint-Gratien station:

  • Take bus 138 to Ermont-Eaubonne and then line J to Paris Saint-Lazare
  • Or take bus 261 to Sannois and then line J to Paris Saint-Lazare

 

To get to Paris from Epinay-sur-Seine station:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris
  • Or take the T11 tram to Epinay – Villetaneuse and then line H to Gare du Nord

 

To go to Paris from the stations of Gennevilliers and Grésillons:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris

Work information from 16 to 24 July 2026

1. Reminder of closures

Map of closed sections

From 16 to 24 July 2026:

  • The RER C is interrupted from Gare d'Austerlitz to Pontoise, as well as from Gare d'Austerlitz to Versailles Château Rive Gauche and Saint-Quentin-en-Yvelines.
  • Metro 12 is interrupted from Concorde to Jules Joffrin.
  • The T1 tramway was interrupted from Asnières – Quatre Routes to La Courneuve – 8 May 1945.
  • The T2 tramway is interrupted from Charlebourg to Puteaux.

2. Alternative routes to take during the period

Map showing the recommended alternative routes

To get to Paris from Pontoise and Saint-Ouen L'Aumône stations:

  • Take line J from Pontoise to Paris Saint-Lazare.

 

To go to Paris from the stations of Saint-Ouen L'Aumône – Liesse, Pierrelaye, Montigny-Beauchamp, Franconville – Le Plessis-Bouchard and Cernay:

  • Take line H from these stations to Gare du Nord.

Be careful, a large crowd is to be expected at Gare du Nord as well as on lines 4 and 5 of the metro.

 

To go to Paris from Ermont – Eaubonne station:

  • Take line J at Ermont - Eaubonne to Paris Saint-Lazare

 

To get to Paris from Saint-Gratien station:

  • Take bus 138 to Ermont-Eaubonne and then line J to Paris Saint-Lazare
  • Or take bus 261 to Sannois and then line J to Paris Saint-Lazare

 

To get to Paris from Epinay-sur-Seine station:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris
  • Or take the T11 tram to Epinay – Villetaneuse and then line H to Gare du Nord

 

To go to Paris from the stations of Gennevilliers and Grésillons:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris

Work information from 25 to 30 July 2026

1. Reminder of closures

Map of closed or reduced supply sections

From 25 to 30 July 2026:

Section closures

  • The RER B is interrupted from Gare du Nord to Bourg-La-Reine.
  • The RER C is interrupted from Gare d'Austerlitz to Pontoise, as well as from Gare d'Austerlitz to Versailles Château Rive Gauche and Saint-Quentin-en-Yvelines.
  • The RER D is interrupted from Gare du Nord to Gare de Lyon.
  • Line K is interrupted from Mitry-Claye to Gare du Nord.
  • Metro 12 is interrupted from Concorde to Jules Joffrin.
  • The T1 tramway was interrupted from Asnières – Quatre Routes to La Courneuve – 8 May 1945.
  • The T2 tramway is interrupted from Charlebourg to Puteaux.

 

Offer Discounts

  • On the RER B, from Gare du Nord to Charles de Gaulle / Mitry - Claye Airport,
  • On the RER D, from Gare du Nord to Creil,
  • On the whole of line H, except the Gare du Nord – Pontoise branch.

2. Alternative routes to take during the period

Map of recommended alternative routes

To get to Paris from Pontoise and Saint-Ouen L'Aumône stations:

  • Take line J from Pontoise to Paris Saint-Lazare.

 

To go to Paris from the stations of Saint-Ouen L'Aumône – Liesse, Pierrelaye, Montigny-Beauchamp, Franconville – Le Plessis-Bouchard and Cernay:

  • Take line H from these stations to Gare du Nord.

Be careful, a large crowd is to be expected at Gare du Nord as well as on lines 4 and 5 of the metro.

 

To go to Paris from Ermont – Eaubonne station:

  • Take line J at Ermont - Eaubonne towards Paris Saint-Lazare.

 

To get to Paris from Saint-Gratien station:

  • Take bus 138 to Ermont-Eaubonne and then line J to Paris Saint-Lazare
  • Or take bus 261 to Sannois and then line J to Paris Saint-Lazare

 

To get to Paris from Epinay-sur-Seine station:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris
  • Or take the T11 tram to Epinay – Villetaneuse and then line H to Gare du Nord

 

To go to Paris from the stations of Gennevilliers and Grésillons:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris

Work information from 31 July to 16 August 2026

1. Reminder of closures

Map of closed lines and supply reductions

From July 31 to August 16, 2026:

Section closures

  • The RER B is interrupted from Gare du Nord to Bourg-La-Reine.
  • The RER C is interrupted from Gare d'Austerlitz to Pontoise, as well as from Gare d'Austerlitz to Versailles Château Rive Gauche and Saint-Quentin-en-Yvelines.
  • The RER D is interrupted from Gare du Nord to Gare de Lyon.
  • Line K is interrupted from Mitry-Claye to Gare du Nord.
  • Metro 13 is interrupted from La Fourche to Saint-Denis – Université (and complete closure of the line on Sunday 2 August and 16 August until noon).
  • The T1 tramway was interrupted from Asnières – Quatre Routes to La Courneuve – 8 May 1945.
  • The T2 tramway is interrupted from Charlebourg to Puteaux.

 

Offer Discounts

  • On the RER B, from Gare du Nord to Charles de Gaulle / Mitry - Claye Airport,
  • On the RER D, from Gare du Nord to Creil,
  • On the whole of line H, except the Gare du Nord – Pontoise branch.

2. Alternative routes to take during the period

Map of recommended alternative routes

To get to Paris from Pontoise and Saint-Ouen L'Aumône stations:

  • Take line J from Pontoise to Paris Saint-Lazare

 

To go to Paris from the stations of Saint-Ouen L'Aumône – Liesse, Pierrelaye, Montigny-Beauchamp, Franconville – Le Plessis-Bouchard and Cernay:

  • Take line H from these stations to Gare du Nord

Be careful, a large crowd is to be expected at Gare du Nord as well as on lines 4 and 5 of the metro.

 

To go to Paris from Ermont – Eaubonne station:

  • Take line J at Ermont - Eaubonne to Paris Saint-Lazare

 

To get to Paris from Saint-Gratien station:

  • Take bus 138 to Ermont-Eaubonne and then line J to Paris Saint-Lazare
  • Or take bus 261 to Sannois and then line J to Paris Saint-Lazare

 

To get to Paris from Epinay-sur-Seine station:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris
  • Or take the T11 tram to Epinay – Villetaneuse and then line H to Gare du Nord

 

To go to Paris from the stations of Gennevilliers and Grésillons:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris

Work information on 17 August 2026

1. Reminder of closures

Map representing closed lines
  • The RER C is interrupted from Gare d'Austerlitz to Pontoise, as well as from Gare d'Austerlitz to Versailles Château Rive Gauche and Saint-Quentin-en-Yvelines.
  • Metro 13 is interrupted from La Fourche to Saint-Denis - Université.
  • The T1 tramway was interrupted from Asnières – Quatre Routes to La Courneuve – 8 May 1945.
  • The T2 tramway is interrupted from Charlebourg to Puteaux.

2. Alternative routes to take during the period

Map showing the recommended alternative routes

To get to Paris from Pontoise and Saint-Ouen L'Aumône stations:

  • Take line J from Pontoise to Paris Saint-Lazare.

 

To go to Paris from the stations of Saint-Ouen L'Aumône – Liesse, Pierrelaye, Montigny-Beauchamp, Franconville – Le Plessis-Bouchard and Cernay:

  • Take line H from these stations to Gare du Nord

Be careful, a large crowd is to be expected at Gare du Nord as well as on lines 4 and 5 of the metro.

 

To go to Paris from Ermont – Eaubonne station:

  • Take line J at Ermont - Eaubonne towards Paris Saint-Lazare.

 

To get to Paris from Saint-Gratien station:

  • Take bus 138 to Ermont-Eaubonne and then line J to Paris Saint-Lazare
  • Or take bus 261 to Sannois and then line J to Paris Saint-Lazare

 

To get to Paris from Epinay-sur-Seine station:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris
  • Or take the T11 tram to Epinay – Villetaneuse and then line H to Gare du Nord

 

To go to Paris from the stations of Gennevilliers and Grésillons:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris

Work information from 18 to 22 August 2026

1. Reminder of closures

Map representing closed lines
  • The RER C is interrupted from Gare d'Austerlitz to Pontoise, as well as from Gare d'Austerlitz to Versailles Château Rive Gauche and Saint-Quentin-en-Yvelines.
  • The T1 tramway is interrupted from Asnières – Quatre Routes to La Courneuve – 8 May

2. Alternative routes to take during the period

Map showing the recommended alternative routes

To get to Paris from Pontoise and Saint-Ouen L'Aumône stations:

Take line J from Pontoise to Paris Saint-Lazare.

 

To go to Paris from the stations of Saint-Ouen L'Aumône – Liesse, Pierrelaye, Montigny-Beauchamp, Franconville – Le Plessis-Bouchard and Cernay:

  • Take line H from these stations to Gare du Nord

Be careful, a large crowd is to be expected at Gare du Nord as well as on lines 4 and 5 of the metro.

 

To go to Paris from Ermont – Eaubonne station:

  • Take line J at Ermont - Eaubonne towards Paris Saint-Lazare.

 

To get to Paris from Saint-Gratien station:

  • Take bus 138 to Ermont-Eaubonne and then line J to Paris Saint-Lazare
  • Or take bus 261 to Sannois and then line J to Paris Saint-Lazare

 

To get to Paris from Epinay-sur-Seine station:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris
  • Or take the T11 tram to Epinay – Villetaneuse and then line H to Gare du Nord

 

To go to Paris from the stations of Gennevilliers and Grésillons:

  • Take bus 138 to Saint-Ouen and then metro 14 to Paris

Work information from 23 to 30 August 2026

Reminder of closures

Map representing closed lines
  • Line 12 of the metro is completely closed from 10 p.m. on August 23, 26 and 30.
  • Line 13 of the metro is completely closed on Sunday, August 30 until noon.
  • The T1 tramway was interrupted from Asnières – Quatre Routes to La Courneuve – 8 May 1945.