science

Paris Metro Line 14

Paris Metro Line 14 is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Paris Metro Line 14 rather than just read about it. In short: Paris Metro Line 14 (French: Ligne 14 du métro de Paris) is one of the sixteen lines currently open on the Paris Métro. It connects Saint-Denis–Pleyel and Aéroport d'Orly on a northwest–southeast diagonal via the three major stations of Gare Saint-Lazare, the Châtelet–Les-Halles complex, and Gare de Lyon.

Key takeaways

Paris Metro Line 14 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Paris Metro Line 14 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Paris Metro Line 14 from memory before moving on to harder problems.

Reference excerpt

Paris Metro Line 14 (French: Ligne 14 du métro de Paris) is one of the sixteen lines currently open on the Paris Métro. It connects Saint-Denis–Pleyel and Aéroport d'Orly on a northwest–southeast diagonal via the three major stations of Gare Saint-Lazare, the Châtelet–Les-Halles complex, and Gare de Lyon. The line goes through the centre of Paris and also serves the communes of Saint-Denis, Saint-Ouen-sur-Seine, Clichy, Le Kremlin-Bicêtre, Gentilly, Villejuif, Chevilly-Larue, L'Haÿ-les-Roses, Thiais and Paray-Vieille-Poste. The first Paris Métro line built from scratch since the 1930s, line 14 has been operated completely automatically since its opening in 1998, and the very positive return of that experiment motivated the retrofitting of Line 1 for full automation. Before the start of its commercial service Line 14 was known as project Météor, an acronym for MÉTro Est-Ouest Rapide. The line has been used as a showcase for the expertise of the RATP (the operator), Alstom, Systra and Siemens Mobility (constructors of the rolling stock and automated equipment respectively) when they bid internationally to build metro systems. A northward extension to Mairie de Saint-Ouen opened in December 2020. The line extended further north to Saint-Denis–Pleyel and south to Aéroport d'Orly, as part of the Grand Paris Express project, on 24 June 2024. Those extensions made Line 14 the longest in the Métro, at 27.8 km of length. As of Fall 2025, it is the busiest line of the Paris Metro, carrying around 820,000 riders per weekday.

Chronology 1983: RER A, which was built to desaturate Métro Line 1, also comes to saturation. A new line on the West ↔ East axis is needed. 1987: RATP and SNCF each coin new route projects to desaturate Lines 1 and A : SNCF coins project ÉOLE, an RER axis connecting the Paris-Est suburban network to Saint-Lazare with an upcoming extension westbound towards La Défense, RATP coins project MÉTEOR – a subway line connecting Porte Maillot to Porte d'Ivry alongside RER A – 1989: French Government validates ÉOLE straightaway, and sends RATP back to the drawing board. October 1989: French Prime minister of the time, Michel Rocard, validates both projects, yet limits them to their parisian section due to budget constraints : ÉOLE is a mere tunnel from Paris-Est to Saint-Lazare with the two aforementioned stations, MÉTEOR's second project – a subway line from Saint-Lazare to Maison Blanche along the Seine, with planned extensions north to Asnières by taking over line 13's northwestern branch, and south towards Orly airport – is limited at first to Madeleine north (in order to avoid supplemental charge on Line 13) and to the brand new Bibliothèque François Mitterrand station south, with the actual Olympiades station initially used as the line's depot. September 1993: Sandrine, Météor's tunnel boring machine, starts digging. 28 September 1994: RATP reuses the immerged caissons technique, 90 years after line 4, to create Méteor's tunnel under the Seine. 26 May 1997: Météor test runs begin. 15 October 1998: Météor is inaugurated as Line 14 between Madeleine and Bibliothèque François Mitterrand. It's the first modern subway line of the Paris Métro : Driverless, with 120 meters long stations equipped with platform screen doors and full access for people with reduced mobility, all from day one. 15 February 2003: while digging the first southern extension, a kindergarten's recess courtyard collapses in Paris' 13th arrondissement, halting the digging process and causing delays. 16 December 2003: northern extension from Madeleine to Saint-Lazare opens, traffic surges by 30% 26 June 2007: first southern extension from Bibliothèque François Mitterrand to Olympiades opens, with a new workshop opened further southwest towards Maison Blanche 3 March 2014: first of eighteen MP 05 trains enters into revenue service 12 October 2020: first of thirty five MP 14 trains enters into revenue service 14 December 2020: second northern extension from Saint-Lazare to Mairie de Saint-Ouen opens, except Porte de Clichy. 28 January 2021: Porte de Clichy opens to passengers, finalising RATP's attempt to use line 14 to alleviate traffic on line 13. 13 April 2023: last runs of both MP 89 and MP 05 rolling stock on the line, the two are subsequently transferred to Line 4 24 June 2024: third northern extension from Mairie de Saint-Ouen to Saint-Denis–Pleyel opens 24 June 2024: second southern extension from Olympiades to Aéroport d'Orly opens, except Villejuif–Gustave Roussy which is still in construction. 18 January 2025: Villejuif–Gustave Roussy opens for line 14, the line 15's platform still closed.

Development

Project Météor

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Paris Metro Line 14

Start with the simplest possible case. Write down what Paris Metro Line 14 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Paris Metro Line 14 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Paris Metro Line 14 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Paris Metro Line 14

In research: Paris Metro Line 14 appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Paris Metro Line 14 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Paris Metro Line 14 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 750 V DC railway electrification, Paris Metro Line 14, Paris Metro lines, so understanding it makes those chapters shorter.
In everyday life: Look for Paris Metro Line 14 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Paris Metro Line 14 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Paris Metro Line 14 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Paris Metro Line 14 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Paris Metro Line 14 in simple terms?

Why does Paris Metro Line 14 matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Paris Metro Line 14?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Paris Metro Line 14.