RER NG
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RER NG (French: ''RER Nouvelle Génération'', English: ''RER New Generation''), also known as the X'Trapolis Cityduplex and classified as Class Z 58000 and Class Z 58500, is a double-deck, dual-voltage
electric multiple unit An electric multiple unit or EMU is a multiple-unit train consisting of self-propelled carriages using electricity as the motive power. An EMU requires no separate locomotive, as electric traction motors are incorporated within one or a number o ...
trainset that operates on line D and line E of the
Réseau Express Régional The (; ), commonly abbreviated RER (), is a hybrid commuter rail and rapid transit system serving Paris and its suburbs. It acts as a combined city-center underground rail system and suburbs-to-city-center commuter rail, similar to the Elizabe ...
(RER), a hybrid suburban commuter and
rapid transit Rapid transit or mass rapid transit (MRT) or heavy rail, commonly referred to as metro, is a type of high-capacity public transport that is generally built in urban areas. A grade separation, grade separated rapid transit line below ground su ...
system serving
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
and its
ÃŽle-de-France The ÃŽle-de-France (; ; ) is the most populous of the eighteen regions of France, with an official estimated population of 12,271,794 residents on 1 January 2023. Centered on the capital Paris, it is located in the north-central part of the cou ...
suburbs. The trainsets have gradually been introduced to service since November 2023 on line E, and since December 2024 on line D. The trainsets are being built by a
consortium A consortium () is an association of two or more individuals, companies, organizations, or governments (or any combination of these entities) with the objective of participating in a common activity or pooling their resources for achieving a ...
of
French French may refer to: * Something of, from, or related to France ** French language, which originated in France ** French people, a nation and ethnic group ** French cuisine, cooking traditions and practices Arts and media * The French (band), ...
manufacturer
Alstom Alstom SA () is a French multinational rolling stock manufacturer which operates worldwide in rail transport markets. It is active in the fields of passenger transportation, signaling, and locomotives, producing high-speed, suburban, regional ...
and
Canadian Canadians () are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of their being ''C ...
conglomerate Bombardier. The RER NG is part of Alstom's X'Trapolis Duplex platform and is an evolution of several generations of double-deck trainsets built by the consortium, including the Z 2N,
MI 2N The MI 2N (French: ''Matériel d'Interconnexion à 2 Niveaux'', English: ''two-level interconnection rolling stock'') is a family of double-deck, dual-voltage electric multiple unit trainsets that are operated on the Réseau Express Régional ( ...
, and
MI 09 The MI 09 (French: ''Matériel d'Interconnexion de 2009'', English: ''interconnection rolling stock of 2009'') is a double-deck, dual-voltage electric multiple unit trainset that is operated on line A of the Réseau Express Régional (RER), a ...
series. Final assembly takes place at the Alstom factory in
Valenciennes Valenciennes (, also , , ; ; or ; ) is a communes of France, commune in the Nord (French department), Nord Departments of France, department, Hauts-de-France, France. It lies on the Scheldt () river. Although the city and region experienced ...
and the former Bombardier plant in Crespin, while the car bodies are being manufactured at the Alstom plant in
Česká Lípa Česká Lípa (; ) is a town in the Liberec Region of the Czech Republic. It has about 37,000 inhabitants, making it the most populated Czech town without city status. The historic town centre is well preserved and is protected as an urban monume ...
, Czech Republic.


History

As
Île-de-France Mobilités Île-de-France Mobilités (IDFM) is the governmental authority ( EPA) that controls and coordinates the different companies operating the Paris-area public transport network and the rest of the Île-de-France region. In this capacity, it issu ...
and
SNCF The Société nationale des chemins de fer français (, , SNCF ) is France's national State-owned enterprise, state-owned railway company. Founded in 1938, it operates the Rail transport in France, country's national rail traffic along with th ...
prepared to extend the RER E line west across Paris, the agencies issued a
invitation to tender An invitation to tender (ITT, also known as a call for bids or a request for tenders) is a formal, structured procedure for generating competing offers from different potential suppliers or contractors looking to obtain an award of business activ ...
for new trainsets for the line and overall fleet replacement. Several manufacturers responded including a
consortium A consortium () is an association of two or more individuals, companies, organizations, or governments (or any combination of these entities) with the objective of participating in a common activity or pooling their resources for achieving a ...
of
Alstom Alstom SA () is a French multinational rolling stock manufacturer which operates worldwide in rail transport markets. It is active in the fields of passenger transportation, signaling, and locomotives, producing high-speed, suburban, regional ...
and Bombardier,
CAF CAF or caf may refer to: Armed forces *Canadian Armed Forces (Canadian Forces), the Canadian Air Force, Army, and Navy *Canadian Air Force, now the Royal Canadian Air Force *Republic of China Air Force, the air force of the Republic of China (Tai ...
, and
Siemens Siemens AG ( ) is a German multinational technology conglomerate. It is focused on industrial automation, building automation, rail transport and health technology. Siemens is the largest engineering company in Europe, and holds the positi ...
. Ultimately, the contract was awarded to Alstom and Bombardier on 6 January 2017. The consortium had previously built several generations of double-deck trainsets, including the Z 2N,
MI 2N The MI 2N (French: ''Matériel d'Interconnexion à 2 Niveaux'', English: ''two-level interconnection rolling stock'') is a family of double-deck, dual-voltage electric multiple unit trainsets that are operated on the Réseau Express Régional ( ...
, and
MI 09 The MI 09 (French: ''Matériel d'Interconnexion de 2009'', English: ''interconnection rolling stock of 2009'') is a double-deck, dual-voltage electric multiple unit trainset that is operated on line A of the Réseau Express Régional (RER), a ...
series. Similar to those earlier contracts, Alstom would build the two end cars, which contain the cabs, while Bombardier manufactured the intermediate cars. The contract will supply 255 trainsets, 130 for the RER E and 125 for fleet replacement, which are planned to be assigned to the RER D, replacing older trainsets. In October 2018, Île-de-France Mobilités purchased an additional 64 trainsets for fleet replacement, increasing the total contract to 371 trainsets. In spring 2020, the first trainset started testing in the
Czech Republic The Czech Republic, also known as Czechia, and historically known as Bohemia, is a landlocked country in Central Europe. The country is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the south ...
. On April 26, 2023, Alstom announced the exercise of a first option for the supply of 60 additional trainsets, bringing orders to 131 trainsets. The first six-car Z 58000 trainsets were introduced to regular passenger service on line E of the RER on 13 November 2023. Introduction of seven-car Z 58500 trainsets on line D followed on 13 December 2024.


Description

The design of the RER NG is similar to Bombardier's Regio 2N trainsets with a mix of single and double-deck cars. The single-level end cars are designed to offer
level boarding Various terms are used for passenger railway lines and equipment; the usage of these terms differs substantially between areas: Rapid transit A rapid transit system is an electric railway characterized by high speed (~) and rapid acceleratio ...
that accommodates disabled passengers who are unable to use stairs and standing passengers traveling short distances. The double-deck intermediate cars accommodate seated passengers traveling longer distances. The RER NG trainsets are being built in two different configurations: * Class Z 58000: 130 six-car trainsets for the RER line E consisting of two single-level cars with cabs and motors, two bi-level cars with motors, and two unpowered bi-level cars at a total length of . * Class Z 58500: 125 seven-car trainsets for the RER line D consisting of two single-level cars with cabs and motors, two bi-level cars with motors, and three unpowered bi-level cars at a total length of . The single-level end cars are long, with two doors per side (one wide and one wide). The double-deck intermediate cars each have two doors per side. The doors located just behind the driving cabs are fitted with gap fillers to enable level boarding for passengers using a mobility device, like a wheelchair. All trainsets have
open-gangway A gangway connection or corridor connection is a flexible connector fitted to the end of a railway coach, enabling passengers to move between coaches without danger of falling from the train. Origins: Coaches in British and American railways Th ...
s allowing passengers to travel from one end of the trainset to the other, allowing more an even distribution of passengers on board, reducing crowding during peak periods. Unlike some other open-gangway trainsets, the RER NG will not use a
jacobs bogie Jacobs bogies (named after Wilhelm Jakobs, 1858–1942, a German Mechanical engineering, mechanical Railway engineering, railway engineer) are a type of Rail transport, rail vehicle bogie commonly found on Articulated car, articulated railcars an ...
between cars, but rather a conventional architecture with two bogies on each car. Like all RER trains since the
MI 84 The MI 84 (French: ''Matériel d'Interconnexion de 1984'', English: ''interconnection rolling stock of 1984''), also known as the Class Z 8100 is a Multi-system (rail), dual-voltage electric multiple unit trainset that is operated on RER B, line ...
, the RER NG is required to meet strict acceleration standards, being able to fully depart a platform in 23 seconds. Despite the fact that the RER NG is heavier and up to longer than a MI 84, it is able to meet this standard with its eight or ten motorised bogies. The maximum top speed for the RER NG in service is . During testing, speeds of were reached. The RER NG trainsets are equipped with the NExTEO system for operating in the tunnels of the central section on the RER E, allowing for travel speeds at up to in that section.


Formations

, at least 3 Z58000 trainsets were in tests. The six-car class Z 58000 trainsets are in operation on RER line E. They are based at the Noisy-le-Sec and Nanterre SNCF depots. As shown below, they are formed of four motorised cars and two non-powered trailer cars. * < or > show a pantograph. Cars 1 and 6 are each equipped with one pantograph. * All cars are connected by gangway. The seven-car Class Z 58500 trainsets in operation on RER line D. They are based at the Villeneuve and Joncherolles SNCF depots. As shown below, they are formed of four motorised cars and three non-powered trailer cars. * < or > show a pantograph. Cars 1 and 7 are each equipped with one pantograph. * All cars are connected by gangway.


References

{{SNCF units Z58000 Electric multiple units of France Réseau Express Régional multiple units 25 kV AC multiple units Double-decker EMUs Alstom multiple units Bombardier Transportation multiple units 1500 V DC multiple units of France Train-related introductions in 2023