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Line 4
	; ;
	; MP 89CC stock train arriving at Denfert-Rochereau.;
Overview
System	Paris Métro
Termini	; Porte de Clignancourt; Mairie de Montrouge;
Connecting lines	; ; ; ; ;
Stations	27
Ridership	171,000,000 (avg. per year); 2nd/16
Operation
Opened	1908
Operator(s)	RATP
Conduction system	Conductor (PA)
Rolling stock	; MP 89CC; (48 trains in operation as of March 23, 2013); (4 trains in reserve as of March 23, 2013);
Technical
Line length	12.1 km (7.5 mi)
Track gauge	; 1,435 mm (4 ft 8 1⁄2 in) standard gauge; between roll ways;
Electrification	750 V DC, guide bars on either side of the track
Route map
	; Legend;
; proposed extension;	;
Saint-Ouen Les Docks;	;
	; ; ;
	; to La Plaine – Stade de France;
	; to Stade de France - Saint-Denis;
	; ; ;
; proposed extension;	;
; proposed extension;	;
	; ; This diagram: ; view; ; talk; ; edit; ; ; ;

Line 4 (French pronunciation: [liɲᵊ katʁᵊ]) is one of the sixteen lines of the Paris Métro rapid transit system. Situated mostly within the boundaries of the City of Paris, it connects Porte de Clignancourt in the north and Mairie de Montrouge in the south, travelling across the heart of the city. Prior to 2013, when the southern terminus was changed from Porte d'Orléans to Mairie de Montrouge, the line was sometimes referred to as the Clignancourt – Orléans Line. At 12.1 km (7.5 mi) in length, it connects to all of the lines of the Métro apart from the 3bis and 7bis branch lines, as well as all of the RER express lines. Further, it is the second-busiest Métro line after Line 1, carrying over 154 million passengers in 2004.

Line 4 was the first line to connect the Right and Left Banks of Paris via an underwater tunnel, built between 1905 and 1907. Line 4 long ran the oldest cars in service on the system, the MP 59, which used rubber tyres to dissipate the braking power through resistance. Those trains were withdrawn from service during the course of 2011 and 2012 after 45 years (with some being in service for 50 years). They were replaced by the MP 89 CC stock from Line 1. (From fr:Ligne 4 du métro de Paris).

In the first decade of the 21st century, Line 4 was extended for the first time since its initial construction, into the southern suburbs of Montrouge. It now serves the new southern terminus of Mairie de Montrouge. Construction of the extension began in 2008 and it opened to passengers on March 23, 2013 [1] [2]. The line is now being retrofitted for full automation, with completion expected in the early 2020s.

History

Chronology

21 April 1908: A first section of the line was inaugurated to the north of the Seine between Porte de Clignancourt and Châtelet.

30 October 1909: A second section of the line was inaugurated south of the Seine between Porte d'Orléans and Raspail.

9 January 1910: Both sections were linked by a new tunnel between Châtelet and Raspail. Line 4 was the first line crossing the Seine river underground.

1967: The rails were converted in order to cater for rubber-tired trains. The MP 59 rolling stock replaced the steel-wheeled Sprague-Thomson stock.

3 October 1977: The station Les Halles was rebuilt to interchange with the new RER network.

23 May 2011: Cascading of MP 59 to MP 89CC rolling stock began.

21 December 2012: The last MP 59 (#6021) was withdrawn after 45 years of service on Line 4.

23 March 2013: Station Mairie de Montrouge officially opened to passengers, marking the first extension of Line 4 since its inception.

Origins

Original abandoned route (black) and built route (red) of Line 4 through the île de la Cité.

Line 4, opened in 1908, was the last line of the original concession of the Compagnie du chemin de fer métropolitain de Paris and the first to cross the Seine underground (Line 5—now Line 6 at this point—crossed the river on the Passy bridge, later renamed the Pont de Bir-Hakeim in 1906). The route was the subject of lengthy discussions that delayed the start of construction of the tunnel. It was originally planned as a straight line under the Rue du Louvre, under the Seine in line with the street, under the Institut de France, along the Rue de Rennes and then the Boulevard Raspail to the Porte d'Orleans.

But as a result of the delay in beginning the extension of the Rue de Rennes as part of Haussmann's plan to the Seine—which was never carried out—and the outcry from the academics who refused categorically to agree to the line passing under the Institut de France, the route was eventually changed to cross further east through the Place du Châtelet and the Île de la Cité.^[2] The new route also has more coherence as a north-south route following the main traffic flows. A second modification of the route was also made: it was decided to make a temporary deviation via the major station of Gare Montparnasse to avoid a further delay in opening the line, which was eagerly awaited. This was made necessary by the delay in building the new Boulevard Raspail between Rue de Rennes and Boulevard du Montparnasse.^[3] Once the Boulevard Raspail was completed, it was planned to take the shorter route and bypass the Gare Montparnasse. To the south of the Vavin station the tunnel provides for the final route along the Boulevard Raspail. But the value in serving three major mainline stations by the line later led to the abandonment of this proposal.^[4]

A spectacular construction site

In 1905 construction was started by the company of Léon Chagnaud—a former mason from Creuse (a department with a tradition of supplying building workers in France)—and line 4 became the first to cross the Seine underground. The method used for crossing under the river is that of metal caissons, twenty to forty meters in length mounted on the banks and sunken vertically in the river bed. The ends of the caissons were blocked and they were towed to their location before being ballasted with water and sunk in the riverbed. A chamber filled with pressurised air was built at the lower level of these caissons so that workers could excavate under the caissons. Each caisson gradually sank to its final position as the ground below it was removed. The northern stream of the Seine required three caissons, the southern stream two caissons.

The crossing of the Seine also involved the freezing of saturated ground between the station of Saint-Michel and the Seine, under the line of the Chemin de Fer de Paris à Orléans (now RER line C) in 1908 and 1909. The installation of two refrigeration plants allowed the movement of brine cooled to −25 °C in dozens of tubes to stabilize the ground.^[5]

The northern section was the first completed: it was opened on 21 April 1908 from Porte de Clignancourt to Châtelet. The southern section was opened 30 on October 1909 from Porte d'Orleans to Raspail. The two sections were connected on 9 January 1910. However, the line was closed to traffic a few days later in January 1910, when the level of the Seine broke its banks during the worst flood of the century. On the morning of 24 January 1910, a significant inflow of water at the Seine crossing interrupted services between Châtelet and Vavin, although services were restored later in the day. But the inflow increased and services were again halted in the afternoon. On 26 January Châtelet station and the crossing under the river was completely flooded and slowly rose in the tunnel. On the night of 27 and 28 January, flooding reached Réaumur – Sébastopol and eventually Gare de l'Est: The line at its minimum was reduced to operating between Clignancourt and Gare du Nord and between Vavin and Porte d'Orleans. The fall in the level of flooding during February allowed a gradual resumption of operations, but full service was not restored to 6 April after repair of extensive damage caused to the infrastructure.^[6]

During the politically turbulent 1930s, Line 4 had its own drama: on 27 July 1934, a package left in a carriage was carried into the office of its chief supervisor, located on the platform of Montparnasse. The package exploded, killing the chief supervisor and another officer and wounding four passengers. The assassins were never found.^[7]

During World War II the most violent bombing Paris suffered was on the night of 20 and 21 April 1944 when the rail freight yard of la Chapelle and the main truck workshop at Rue Championnet were hit. The roof of the Simplon station was hit by a bomb and it collapsed on the tracks and platforms. After repairs the line was brought back into service a few days later.^[8]

Postcard explaining the construction of the crossing under the Seine by the use of pressurised sunken caissons

Sinking of a caisson in the narrow (southern) stream of the Seine in 1906

Sinking of the central caisson in the northern stream of the Seine

Sinking of the Saint-Michel station

Work sites in the Place Saint-Michel and Boulevard Saint-Andre before the sinking

The rubber tyre metro and the deviation of the line

MP 59 rubber-tyred trains.

The RATP was satisfied by experimentation with rubber tyres on Line 11 beginning in 1956. It therefore decided to equip lines 1 and 4 for rubber-tyre operations, which can increase line capacity by providing better acceleration and decelerations as a result of a much superior grip.

In the early 1960s these two lines were the two busiest on the network, with loads of 140% of capacity during the evening peak. However, as this change alone was insufficient to overcome this saturation, the length of stations was lengthened from 75 to 90 metres, allowing the lengthening of train from five to six carriages. This work was carried out very quickly and, as early as October 1965, trains of six carriages traversed the line. On 3 October 1966, the first train composed of MP 59 electric multiple units operated on the line. The Line 4 trains were identical to those on Line 1, being composed of four motor and two trailers per train. The line’s MP 59 fleet included 556 carriages, comprising 376 powered carriages and 180 trailers. On 17 July 1967, the last steel-wheeled train left the line to strengthen the service of other with a hundred cars built before 1914 scrapped.^[9] In February 1971, line 4 was the second network after line 11 to be equipped with semi-automatic operation, with a system known as Grecque (“Greek”). This allowed trains once started by the driver to run automatically and stop at the next station.^[10]

Since its opening the only change of the route of the line took place in early October 1977 with the deviation of the line with the relocation of the station at Les Halles. During the excavation of the enormous Les Halles complex the station of Les Halles was relocated about ten metres further east to allow a shorter connection to Châtelet – Les Halles RER station. For this, three hundred and thirty meters of tunnel were built to join the old route. The changeover took place on three consecutive nights from 10 pm on Friday, 30 September 1977 to the beginning of services on Monday, 3 October. On the first night, the new track 2 was connected, on the second night, the new track 1 was built and on the last night it was connected.^[11]

On 6 August 2005 at 4:42 pm, a fire on a train at Simplon due to the malfunction of a circuit breaker caused the evacuation of two MP 59 trains with 19 people mildly affected. The fire was extinguished by fire fighters at around 6:00 pm.^[12]

Extension to Montrouge and the MP 89

Transition of rolling stock from the MP 59 to the MP 89 took place during 2011 and 2012.

Until 2013, Line 4 was one of a few lines (the others being semi-circular lines 2 and 6, as well as Line 14) that had never been extended beyond the "gates" of Paris. During the 1920s, a preliminary extension towards la Vache-Noire was planned but never carried out. Since that time, no other extension plan was brought up. In 2008, nearly a century after its opening, construction of a one-station extension towards Mairie de Montrouge began. The new station officially opened to passengers on March 23, 2013, allowing one to travel from Montrouge to Clignancourt in 30 minutes.^[13] Mairie de Montrouge is a traditional two-tracked station.

In addition to the Montrouge extension, there has recently been a much-needed refresh in rolling stock for Line 4, as the MP 59 trainsets were reaching the end of their useful lives. The automation of Line 1 and purchasing of new automated rolling stock (the MP 05) allowed the RATP to replace the MP 59 with the MP 89CC rolling stock from Line 1. Testing of the MP 89 during overnight hours took place in 2010, with the first train (#01) to be transferred to Line 4 in April, 2011 and enter service on May 23, 2011. A second train (#44) entered service on September 10, 2011. The first MP 59 train that was retired was #6049, which was pulled from service in April, 2011.

As the MP 05 rolling stock began to debut on Line 1, the pace of transferring the MP 89CC stock from Line 1 to Line 4 increased to roughly 3 trains per month. Since January, 2012, the RATP kept this rate of transfer (increasing the rate to 4 trains during November and December) despite only being able to remove 2 MP 59 trainsets from service each month. During the course of 2011, the following trains were transferred from Line 1 to Line 4: #s 14, 20, 29, 30, 31, 34, 38, and 40. Train #s 03 through 25, 27 through 42, 43, 44, 48, 49, 51, and 52 were transferred during the course of 2012. #45 was transferred on January 3, 2013, marking the 47th train to be moved to Line 4. Between February and March 2013, #s 02, 46, 47, and 50 were transferred. The final MP 89CC train will be #26, schedule to be transferred sometime in April. The last MP 59 train to be pulled from service was #6021, which was withdrawn on December 21, 2012. Though many MP 59 trains operated on Line 4 for roughly 45 years, those trains that were brought over from Line 1 during the late 1990s have circulated throughout the Metro for about 50 years.

It is expected that not all 52 of the MP 89CC trains will be utilized on Line 4 until the Bagneux extension opens in 2019. From fr:Ligne 4 du métro de Paris [3].

Future

Southern Extension towards Bagneux

Mairie de Montrouge

After the opening of Mairie de Montrouge, Line 4 will be extended further south by two stations: Verdun Sud at the frontier between Montrouge and Bagneux (in Montrouge) and Bagneux. In October, 2011, the STIF announced that construction of the Bagneux extension will begin in 2014, with opening expected in 2019 [4]. Verdun Sud will also have a traditional two-track configuration, while Bagneux will have a three-track/dual platform configuration by which many terminating stations possess. Bagneux will also allow connection to the Red Line (now known as Line 15) of the Grand Paris Express network.

Northern Extension towards Saint-Ouen

An extension to the north to the "docks" of Saint-Ouen (an urban redevelopment project next to the Seine) via Mairie de Saint-Ouen (where Line 4 would connect to Line 13's St. Denis branch and the future northern extension of Line 14) was planned for phase 1 (2007–2013) of the Schéma directeur de la région Île-de-France ("Master Plan for the Île-de-France region", SDRIF), which was adopted by resolution of the Regional Council of Ile-de-France on 25 September 2008.^[14] However no detailed studies have been carried out nor finance set aside for it.

Automation

The line is being converted to an automated system (like Line 1), with completion initially expected by 2019.^[15] The initial plans were to begin conversion some time after the completion of the Line 1 conversion, but due to high costs those plans were put on hold (From fr:Ligne 4 du métro de Paris). On April 2, 2013, the RATP confirmed that Line 4 would be fully automated, but stopped short of giving a timeline of the conversion.^[16] In January 2016, Siemens was awarded a €70 million contract to fully automate Line 4.^[17] A mix of passenger and driverless trains will commence in 2020 and the line will be fully driverless by 2022.^[17]

Although rolling stock for the automated line has not yet been confirmed, it is highly speculated that Line 4 will initially see a mix of MP 89CA and MP 05 stock from Line 14 running alongside new MP 14 railcars.

Rolling Stock

Over the years, Line 4 has seen the following rolling stock.

M1: 1908-1930

Sprague-Thomson: 1930 - 1967

MP 59: 1967 - December, 2012

MP 89CC: May, 2011 – Present

(From fr:Ligne 4 du métro de Paris)

Workshops

Until March, 2013; light maintenance of the MP 89CC rolling stock of Line 4 was handled within the station of Porte d'Orléans (CDT). Platform 2 of the station (in the direction of Porte de Clignancourt contains inspection pits, which allow routine light maintenance work and troubleshooting of the first level. Both Porte d'Orléans and Porte de Clignancourt also contain loop tracks where trains can be stored overnight (although many trains are stored within the main tunnels due to a lack of a sufficient garage). This protocol changed when a new garage located south of the new station Mairie de Montrouge opened. Track 3 of station Porte d'Orléans will eventually be dismantled and covered over to make way for a new access point into the station.

Second level maintenance is handled at the Saint-Ouen shops, located just to the north of the Porte de Clignancourt terminus (and its northern loops). The facility extends over an area of 34,000 sq meters and opened in 1908. The shops have been renovated and expanded over the years, including a recent extension to house MP 89CC trainsets that are undergoing routine maintenance (AMT).

In addition to maintaining the MP 89CC trainsets, the Saint-Quen shops also handles heavy maintenance and overhaul of the MF 77 steel-wheel stock trains for lines 7, 8 and 13, as well as numerous auxiliary/service trains. The shop is also specialized in the review of electronic equipment of all network hardware. As of 2007, 60 officers are assigned to train maintenance and 220 to the maintenance of equipment.

All heavy maintenance work for the MP 89CC trainsets are handled in the workshops of Fontenay, located just east of the Chateau de Vincennes terminus of Line 1.

(From fr:Ligne 4 du métro de Paris)

Map and stations

Stations renamed

15 November 1913: Vaugirard station was renamed Saint-Placide.

5 May 1931: Boulevard Saint-Denis was renamed Strasbourg – Saint-Denis.

25 August 1931: Marcadet (on line 4) and Poissonniers (on line 12) were combined and the resulting station was renamed Marcadet – Poissonniers.

6 October 1942: Montparnasse (on lines 4 and 12) and Bienvenüe (on lines 6 and the current 13) were combined and the resulting station was renamed Montparnasse – Bienvenüe.

Map of Paris Métro Line 4.

Themed Stations

Réaumur – Sébastopol has an interactive exhibition devoted to the Conservatoire National des Arts et Metiers (CNAM), located nearby. There are also LCD screens that include interviews and short films on the teaching of the conservatory.

Barbès – Rochechouart has an exhibit on the occupation of Paris during World War II, including newspaper clippings, photos, and a map showing the insurrection of Paris in August 1944

Odéon has a small exhibit on the northbound platform that is dedicated to Georges Jacques Danton; it includes a bust of the French revolutionary, and a copy of the decree proclaiming the First Republic in 1792 .

Saint-Germain-des-Prés is lined with decor evoking the history of literary creation in the district. Extracts of literary works are projected onto the roof, the station being devoid of the usual billboards. This exhibit showcases the stories of young talent in literature.

Montparnasse – Bienvenüe contains an exhibit honoring principal engineer of the Paris Métro, Fulgence Bienvenüe. It has been naturally selected as an exhibition space on the network technology and literary history of the subway in 2000 during its centennial. Many books citing excerpts from the subway especially adorn the grand hall that connects each of the four metro lines in the station (4, 6, 12, and 13).

Mouton-Duvernet was once adorned with orange wall tiles when it was renovated in 1970. The orange styling quickly became known as the "Mouton style". However, the station was renovated again during the 2000s, reverting its theme back to the classic white tile.

Both Saint-Michel and Cité contain dark-colored metal structures that serve as interconnecting levels between the platform level and the entry/ticketing level.

(From fr:Ligne 4 du métro de Paris)

Tourism

Metro line 4 passes near several places of interest and therefore often crowded :

Barbès and the Goutte d'Or and their African and Asian influences.

Gare du Nord and Gare de l'Est 19th century train stations.

L'Île de la Cité with the Notre Dame Cathedral.

Saint-Michel and the Latin Quarter.

Saint-Germain des Prés quarter with its church and famous cafés.

Rue de Rennes shopping street.

Luxembourg Garden.

Montparnasse, its famous cafés, the Gare Montparnasse and the Montparnasse Tower.

Although the line is generally fast and serves many places of interest, it's considered by many of its passengers as unpleasant. In addition to being completely underground, the line suffers from a certain discomfort (excessive heat during summer) along with a global impression of dirtiness and insecurity, notably due to its very high number of passengers. Finally, attacks towards train drivers and passengers are by far the most frequent in the network, whether it concerns petty crimes or violence.

Reception

According to Facebook group New Urbanist Memes for Transit-Oriented Teens, M4 is considered "chaotic good" on the Dungeons & Dragons (D&D) alignment system.^[18]^[19]

Gallery

Cité

Cité

Cité

Mairie de Montrouge

Marcadet – Poissonniers

Mouton-Duvernet

Montparnasse – Bienvenüe

Odéon

Porte d'Orleans

Saint-Germain-des-Prés

Vavin

Play media

Vavin

Notes

^ http://www.symbioz.net/index.php?id=101 M4 : Prolongement & arrivée du MP89 (French)

^ Robert (1983), p. 71

^ Tricoire (1999), p. 187

^ Robert (1983), p. 74

^ "Historique du métro (History of the metro)". Syndicat des transports d'Île-de-France. Retrieved 18 September 2009..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}

^ Robert (1983), pp. 74–78

^ Robert (1983), p. 372

^ Robert (1983), p. 140

^ Robert (1983), pp. 157–158

^ Sirand-Pugnet (1997), p. 43

^ Sirand-Pugnet (1997), pp. 119–22

^ "L'incendie de deux rames de métro de la ligne 4 à la station Simplon le 6 août 2006" (in French). Bureau d'Enquêtes sur les Accidents de Transport Terrestre. Retrieved 18 September 2009.

^ http://www.ratp.fr/fr/ratp/c_5097/actualites/ La ligne 4 arrive à Montrouge - RATP - Retrieved 3/23/2013 (In French)

^ "Développer le réseau pour accompagner le projet urbain (Expand the network to support urban development)" (PDF) (in French). Master Plan for the Île-de-France region. p. 81. Retrieved 10 September 2009.

^ http://www.railwaygazette.com/news/single-view/view/ratp-cleared-to-automate-paris-metro-line-4.html

^ http://www.lefigaro.fr/societes/2013/04/02/20005-20130402ARTFIG00282-la-ratp-prepare-l-automatisation-de-la-ligne-4-du-metro-parisien.php La RATP prépare l'automatisation de la ligne 4 du métro parisien {In French} - Retrieved April 3, 2013

^ ^a^b "Siemens to equip Line 4 of the Metro Paris for driverless operation". Siemens.com. 2016-01-07. Retrieved 2017-05-07.

^ Mortice, Zach (29 March 2018). "Meet the 61,000 Transit Nerds of Facebook's 'New Urbanist Memes for Transit-Oriented Teens'". Chicago. Tronc. Retrieved 30 April 2018.

^ Mortice, Zach (9 April 2018). "Meet the 61,000 Transit Nerds of Facebook's 'New Urbanist Memes for Transit-Oriented Teens'". Zach Mortice. zachmortice.com. Retrieved 30 April 2018.

References

Robert, Jean (1983). Notre métro ("Our metro") (in French).

Tricoire, Jean (1999). Un siècle de métro en 14 lignes. De Bienvenüe à Météor ("A century in 14 metro lines. From Bienvenüe to Météor" (in French). La Vie du rail. ISBN 978-2-902808-87-8.

Sirand-Pugnet, Bernard (1997). De la Grand-mère à Météor, 45 ans d'évolution de la technologie des voies au métro de Paris ("From the Grandmother to the Météor, 45 years of evolution of the technology of the lines of the Paris métro" (in French). ISBN 978-2-912252-00-5.

External links

(in French) RATP official website

(in English) RATP english speaking website

(in English) Interactive Map of the RER (from RATP's website)

(in English) Interactive Map of the Paris métro (from RATP's website)

(in French) Mobidf website, dedicated to the RER (unofficial)^{[permanent dead link]}

(in French) Metro-Pole website, dedicated to Paris public transports (unofficial)

TRUCK (bogie)

[1] ttp://www.symbioz.net/index.php?id=101 M4 : Prolongement & arrivée du MP89 (French)

[2] Robert (1983), p. 71

[3] Tricoire (1999), p. 187

[4] Robert (1983), p. 74

[5] "Historique du métro (History of the metro)". Syndicat des transports d'Île-de-France. Retrieved 18 September 2009..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}

[6] Robert (1983), pp. 74–78

[7] Robert (1983), p. 372

[8] Robert (1983), p. 140

[9] Robert (1983), pp. 157–158

[10] Sirand-Pugnet (1997), p. 43

[11] Sirand-Pugnet (1997), pp. 119–22

[12] "L'incendie de deux rames de métro de la ligne 4 à la station Simplon le 6 août 2006" (in French). Bureau d'Enquêtes sur les Accidents de Transport Terrestre. Retrieved 18 September 2009.

[13] ttp://www.ratp.fr/fr/ratp/c_5097/actualites/ La ligne 4 arrive à Montrouge - RATP - Retrieved 3/23/2013 (In French)

[14] "Développer le réseau pour accompagner le projet urbain (Expand the network to support urban development)" (PDF) (in French). Master Plan for the Île-de-France region. p. 81. Retrieved 10 September 2009.

[15] ttp://www.railwaygazette.com/news/single-view/view/ratp-cleared-to-automate-paris-metro-line-4.html

[16] ttp://www.lefigaro.fr/societes/2013/04/02/20005-20130402ARTFIG00282-la-ratp-prepare-l-automatisation-de-la-ligne-4-du-metro-parisien.php La RATP prépare l'automatisation de la ligne 4 du métro parisien {In French} - Retrieved April 3, 2013

[Automation1-17] "Siemens to equip Line 4 of the Metro Paris for driverless operation". Siemens.com. 2016-01-07. Retrieved 2017-05-07.

[Mortice_2018-1-18] Mortice, Zach (29 March 2018). "Meet the 61,000 Transit Nerds of Facebook's 'New Urbanist Memes for Transit-Oriented Teens'". Chicago. Tronc. Retrieved 30 April 2018.

[Mortice_2018-2-19] Mortice, Zach (9 April 2018). "Meet the 61,000 Transit Nerds of Facebook's 'New Urbanist Memes for Transit-Oriented Teens'". Zach Mortice. zachmortice.com. Retrieved 30 April 2018.

v t e Paris transport network
Métro	.mw-parser-output .nobold{font-weight:normal} Planned
RER
Transilien	Paris Est Paris Nord Paris Saint-Lazare Paris La Défense Paris Montparnasse Paris Sud-Est
Tramway	Planned
Bus	RATP Noctilien
Others	CDGVAL Orlyval Montmartre Funicular
Projects	Grand Paris Express CDG Express
Administration	Île-de-France Mobilités RATP Group SNCF Optile Keolis Transdev
Finance	Fares and tickets Versement transport Ticket "t+"
Related articles	Architecture Ghost stations

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Paris Métro Line 4

Contents

History

Chronology

Origins

A spectacular construction site

The rubber tyre metro and the deviation of the line

Extension to Montrouge and the MP 89

Future

Southern Extension towards Bagneux

Northern Extension towards Saint-Ouen

Automation

Rolling Stock

Workshops

Map and stations

Stations renamed

Themed Stations

Tourism

Reception

Gallery

Notes

See also

References

External links

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