RER B

RER B
Overview
Status	Operational
Termini	Aéroport Charles de Gaulle 2 TGV (B3), Mitry–Claye (B5) Robinson (B2), Saint-Rémy-lès-Chevreuse (B4)
Stations	47
Service
Type	Rapid transit/commuter rail
System	Réseau Express Régional
Operator(s)	RATP/SNCF
Rolling stock	MI 79, MI 84
Ridership	165 million journeys per annum (2004)
History
Opened	8 December 1977 (last extension in 1994)
Technical
Line length	80 km (50 mi)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Route map Geographically accurate path of the RER B

RER B
proposed extension Rouvres Dammartin–Juilly –Saint-Mard   Thieux–Nantouillet   Compans   Aéroport CDG 2 TGV  B3   B5  Mitry–Claye   Aéroport CDG 1 Villeparisis – Mitry-le-Neuf Aérofret Vert-Galant Parc des Expositions Sevran – Livry  * Villepinte  * Sevran – Beaudottes     Aulnay-sous-Bois Le Blanc-Mesnil Drancy   *   Le Bourget La Courneuve–Aubervilliers La Plaine–Stade de France ↑ 25 kV AC ↓ 1.5 kV DC          Gare du Nord [  Magenta, Gare de l'Est]            Châtelet–Les Halles Seine      Saint-Michel – Notre-Dame Luxembourg Port-Royal    Denfert-Rochereau   Cité Universitaire Gentilly Laplace  * Arcueil–Cachan Bagneux Bourg-la-Reine Sceaux Parc de Sceaux Fontenay-aux-Roses La Croix de Berny    Tvm  Robinson  B2  Antony Fontaine-Michalon Les Baconnets   Massy–Verrières    *     Massy–Palaiseau Palaiseau Palaiseau–Villebon Lozère Le Guichet Yvette Orsay-Ville Bures-sur-Yvette La Hacquinière Gif-sur-Yvette Courcelle-sur-Yvette  B4  Saint-Rémy-lès-Chevreuse All stations are accessible
(*) Under construction

RER B is one of the five lines in the Réseau Express Régional (English: Regional Express Network), a hybrid suburban commuter and rapid transit system serving Paris, France and its Île-de-France suburbs. The 80 km (50 mi) RER B line crosses the Paris region from north to south, with all trains serving a group of stations in central Paris, before branching out towards the ends of the line.

The line opened in stages starting in December 1977 by connecting two existing suburban commuter rail lines with a new tunnel under Paris: the Chemin de Fer du Nord to the north (which formerly terminated at Gare du Nord) and the Ligne de Sceaux to the south (which formerly terminated at Luxembourg station).

The RER B, along with the rest of the RER network, has had a significant social impact on Paris and the surrounding region by speeding up trips across central Paris, by making far fewer stops than the Paris Métro and by bringing far-flung suburbs within easy reach of the city centre. The line has far exceeded all traffic expectations, with passengers taking 165 million journeys per year in 2004. That makes the RER B the second busiest single rail line in Europe.

The line faces capacity challenges as a result of sharing a tunnel with RER D trains between Châtelet–Les Halles and Gare du Nord.

Chronology

The RER B opened in stages starting in December 1977 by connecting two existing suburban commuter rail lines with a new tunnel under Paris: the Chemin de Fer du Nord to the north (which formerly terminated at Gare du Nord) and the Ligne de Sceaux to the south (which formerly terminated at Luxembourg station).

• June 1846: The Ligne de Sceaux from Massy to Denfert-Rochereau opens to the public.
• 1862: The Chemin de Fer du Nord line from Paris to Soissons via Mitry-Claye is opened.
• 1895: The Ligne de Sceaux is extended from Denfert-Rochereau to Luxembourg.
• 1937: The CMP (the operator of the Paris Métro and predecessor of today's RATP) purchases the Ligne de Sceaux, planning to integrate it into a future regional metro network, now known as the Réseau Express Régional (RER).
• May 1976: A new 13.5 km (8.4 mi) long branch from Aulnay-sous-Bois to Paris-Charles de Gaulle Airport (terminal 1) is opened, linking the airport with Paris.
• December 1977: The Ligne de Sceaux is extended north 2 km (1.2 mi) from Luxembourg station to Châtelet-les Halles station and becomes the RER B.
• December 1981: The RER B is extended north 2.5 km (1.6 mi) from Châtelet-les Halles station to Gare du Nord connecting with trains to Mitry-Claye and the airport. Because the lines north of Gare du Nord used a different electrification system (1.5 kV DC to the south, 25 kV AC to the north), passengers need to make a cross-platform transfer between trains on the north and south lines.
• January 1983: A new station, Parc-des-Expositions, opens between Villepinte and Roissy.
• June 1983: Improvements and dual-voltage equipment allow trains to begin travelling thru Gare du Nord and across entire length of the line.
• February 1988: A new station, St-Michel – Notre-Dame opens between Luxembourg and Châtelet in order to offer a quick connection with RER C and Paris Métro Line 10 at Cluny – La Sorbonne, a station which had been closed since World War II and was entirely renovated.
• October 1994: OrlyVAL line opens, connecting Antony station with Orly Airport.
• November 1994: The line is extended 1 km (0.62 mi) north to Aéroport Charles de Gaulle 2 – TGV.
• January 1998: A new station, La Plaine–Stade de France, opens near the Stade de France in time for the 1998 FIFA World Cup.

List of RER B stations

Inside a RER B train

Luxembourg on the RER B.

Inside an RER B train

Travelers waiting for RER B at Châtelet–Les Halles during a day of strike in 2019

RER B at La Plaine – Stade de France.

• RER B3
  • Aéroport Charles de Gaulle 2 – TGV
  • Aéroport Charles de Gaulle 1
  • Parc des Expositions
  • Villepinte
  • Sevran – Beaudottes
• B5
  • Mitry – Claye
  • Villeparisis – Mitry-le-Neuf
  • Vert-Galant
  • Sevran – Livry
• Aulnay-sous-Bois
• Le Blanc-Mesnil
• Drancy
• Le Bourget
• La Courneuve – Aubervilliers
• La Plaine – Stade de France
• Gare du Nord
• Châtelet – Les Halles
• St-Michel – Notre-Dame
• Luxembourg
• Port-Royal
• Denfert-Rochereau
• Cité Universitaire
• Gentilly
• Laplace
• Arcueil–Cachan
• Bagneux
• Bourg-la-Reine
• B2
  • Sceaux
  • Fontenay-aux-Roses
  • Robinson
• B4
  • Parc de Sceaux
  • La Croix de Berny
  • Antony
  • Fontaine-Michalon
  • Les Baconnets
  • Massy – Verrières
  • Massy – Palaiseau
  • Palaiseau
  • Palaiseau – Villebon
  • Lozère
  • Le Guichet
  • Orsay – Ville
  • Bures-sur-Yvette
  • La Hacquinière
  • Gif-sur-Yvette
  • Courcelle-sur-Yvette
  • Saint-Rémy-lès-Chevreuse

Rolling stock

RER B is operated by 117 sets of the MI 79 series and 31 sets of the MI 84 series. These are to be replaced from 2025 by the MI 20 series.

Past fleet include the MS 61, which operated on the line from 29 June 1967 to 28 February 1983, and the Class Z 23000, which operated from 16 November 1937 to 27 February 1987.

See also

• List of stations of the Paris Métro
• List of stations of the Paris RER

External links

• RATP official website (in French)
• RATP website in English
• Interactive Map of the RER (from RATP's website)
• Interactive Map of the Paris métro (from RATP's website)
• Mobidf website, dedicated to the RER (unofficial) (in French)
• Metro-Pole website, dedicated to Paris public transports (unofficial) (in French)