engineering

Haxo station

Haxo station is a engineering 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 Haxo station rather than just read about it. In short: Haxo (French pronunciation: [akso]) is a never-opened ghost station on the Paris Metro, located on an unused connecting branch between lines 3bis and 7bis. History The station is situated on a single-track line, called voie des Fêtes, constructed in the 1920s between Place des Fêtes (line 7 then, line 7bis now), and Porte des Lilas (line 3 then, 3bis now), close to Pré-Saint-Gervais (line 7bis), in order to allow an…

Key takeaways

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

Reference excerpt

Haxo (French pronunciation: [akso]) is a never-opened ghost station on the Paris Metro, located on an unused connecting branch between lines 3bis and 7bis.

History The station is situated on a single-track line, called voie des Fêtes, constructed in the 1920s between Place des Fêtes (line 7 then, line 7bis now), and Porte des Lilas (line 3 then, 3bis now), close to Pré-Saint-Gervais (line 7bis), in order to allow an extension of said line from the Danube loop towards the Porte des Lilas, for an easier connection to the Line 3, which at the time served the area. For traffic in the other direction, another track was constructed linking Porte des Lilas to Pré Saint-Gervais, with no intermediate station, called la voie navette. Consequently, Haxo would have been a single-direction station with only one platform, like Église d'Auteuil or Chardon-Lagache on Line 10. However, despite the network owners, the City of Paris, having delivered the necessary infrastructure, the railway operator, Compagnie du chemin de fer métropolitain de Paris, did not consider a service to be sufficiently profitable and thus halted the extension process in favor of a single-train shuttle from Pré-Saint-Gervais. Service trains have never called at Haxo, and no pedestrian access to street level was ever constructed. Occasional special enthusiast trains call at Haxo for photography, and the station was also used to demonstrate the MF 88 rolling stock to the press in 1993 (the "1993" sign can be seen on some pictures, still hung more than 10 years later).

Future

Studies about merging Paris Metro lines 3bis and 7bis using the existing currently untrafficked infrastructure have been made, which would therefore finally open Haxo for passenger use. The combined lines would run from Château-Landon to Gambetta. At the moment, the voie navette is blocked at Pré-Saint-Gervais, on the station's second track, by an additional maintenance facility for the MF 88 rolling stock, due to said rolling stock's unreliability. Therefore, the line merger would first require completing the programmed cascading of MF 88 rolling stock to the brand new MF 19, which is expected for 2026.

Station layout

Note: The planned line 7 extension does not pass through Haxo on its way to Pré Saint-Gervais; It uses an outer track, la Voie Navette, next to the station yet not visible from its platform.

See also North End tube station – never-opened station on the London Underground. Porte Molitor station – never-opened station on the Paris Metro. Kymlinge – never-opened station on the Stockholm Metro.

References

External links

(in French and English) Description and photos of Haxo Photo of Haxo at flickr.com (accessed 5 November 2006) Description of Haxo station at Breakintoparis.com Account of visit to Haxo Station at Sleepycity.com Haxo, a dead end station Archived 5 March 2012 at the Wayback Machine

Illustrations

Haxo station: Where Haxo would appear on Paris' Metro map if it were open on merged lines 3bis and 7bis (see Future) — Where Haxo would appear on Paris' Metro map if it were open on merged lines 3bis and 7bis (see Future)

Worked examples

Example 1 — a first encounter with Haxo station

Start with the simplest possible case. Write down what Haxo station claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Haxo station 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 Haxo station 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 Haxo station

In research: Haxo station appears in engineering 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 Haxo station 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: Haxo station is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures completed in 1921, Ghost stations of the Paris Metro, Paris Metro Line 3bis, so understanding it makes those chapters shorter.
In everyday life: Look for Haxo station 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 Haxo station in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Haxo station 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 Haxo station out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Haxo station in simple terms?

Haxo (French pronunciation: [akso]) is a never-opened ghost station on the Paris Metro, located on an unused connecting branch between lines 3bis and 7bis. History The station is situated on a single-track line, called voie des Fêtes, constructed in the 1920s between Place des Fêtes (line 7 then, l…

Why does Haxo station matter?

Because it connects several engineering 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 Haxo station?

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 Haxo station.