Trains run under the ground in a big city.
Fast trains run under the ground.
There are 12 lines in the city.
Trains use power to move. When they slow down, they make power. This power helps charge stations.
Some tracks are wide. Other tracks are narrow. This is very special.
There are 183 stations to visit. You can use a card to ride. It is a great way to travel.
The Barcelona Metro is a fast train network. Most of it runs under the city. It helps people travel through Barcelona, Spain. 
The Barcelona Metro is a fast train network in Spain. Most of the tracks run underground through the center of Barcelona. It helps many people travel between the city and its suburbs. This system is part of a much larger public transport network. This network includes buses, trams, and even regional trains. All these services use a single fare system called ATM.
How does this huge system work? It uses different ways to move people along its paths. Some lines are operated by a company called TMB. Other lines are run by a company called FGC. The network uses different track gauges, which is the width between the rails. It is the only metro in the world using both narrow and broad gauge tracks. It also uses three different gauges in total. The trains even help save energy. They use regenerative braking to create spare power. This power can help charge nearby stations.
Learning about the history shows how the metro grew over time. The very first railway service started in 1863. A private company called Ferrocarril de Barcelona a Sarrià founded it. This early line eventually became what we now call the L6 service. Later, in the 1920s, more systems began to appear. One was the Gran Metro, which is now part of Line 3. Another was the Metro Transversal, which is now part of Line 1. These later companies were inspired by the famous Paris metro system. 
There are many important facts about the size of the network. As of November 2021, there were 183 stations in the system. By early 2020, the total length reached 12 kilometers. The network is made up of 12 different lines. Some lines, like L9 and L10, are still being built. These two lines will be the longest automated lines in Europe. They are expected to be fully finished by the year 2030.
You can see how the metro fits into everyday life. Most stations are simple places with stairs or elevators. You can use special cards like the T-casual for ten rides. There is also a T-usual card for unlimited trips. Some stations are even being updated to be easier for everyone to use. Only 8 out of 192 stations are not yet fully accessible. This work helps make sure everyone can ride the trains. 
The Barcelona Metro is a rapid transit network located in Spain. It serves the capital of Catalonia, Barcelona, and its surrounding suburbs. Most of the tracks run deep underground through the city center. This network is a vital part of the larger public transport system. It is managed by the Autoritat del Transport Metropolità, or ATM. This organization ensures that fares are unified across different types of transport. This includes the metro, local buses, tramways, and regional trains. 
The network operates through a complex system of tracks and power. One unique feature is the use of three different track gauges. A track gauge is the distance between the two rails. The Barcelona Metro is the only metro in the world that uses both narrow and broad gauge tracks. It also uses an older Iberian gauge on Line 1. This makes the system very different from most other cities. To save energy, the system uses regenerative braking. This process captures spare power from the trains. This electricity is then used to power charging stations near the infrastructure.
Currently, the metro is divided between two main operators. Transports Metropolitans de Barcelona, known as TMB, manages eight lines. These are Lines 1 through 5 and Lines 9 through 11. The remaining lines are managed by Ferrocarrils de la Generalitat de Catalunya, or FGC. These include Lines 6, 7, 8, and 12. Some FGC lines, such as Line 7 and Line 8, actually share tracks with commuter rail lines. The lines are identified by numbers or colors on network maps.
The history of the system began long before the modern metro existed. The first rapid transit railway was founded in 1863. A private company called Ferrocarril de Barcelona a Sarrià started this service. This original line eventually evolved into the current Line 6. In the 1920s, new systems began to grow. The Gran Metro was built between Lesseps and Plaça de Catalunya. This became part of the modern Line 3. Two years later, the Metro Transversal was founded. This line connected the city center to the site of the 1929 International Exposition.
Construction is still happening to expand the network today. Lines 9 and 10 are currently being built. These two lines will share a central section. Once finished, they will be the longest automated metro lines in Europe. This means they will use automatic train operation, or driverless vehicle systems. The combined length of these lines will be 48 kilometers. They will include a total of 52 stations. The project is expected to be fully completed by the year 2030.
The scale of the network is quite large. As of November 2021, the network included 183 stations. By early 2020, the total length including the Montjuïc Funicular reached 125 kilometers. The average distance between two stations is approximately 807.50 meters. Most stations are simple access points with stairs or elevators. Passengers use various tickets through the ATM system. For example, the T-casual card allows for ten discounted rides. The T-usual card allows for unlimited journeys over 30 days. 
Accessibility is a major focus for the modern network. Engineers are working to make sure everyone can use the trains. Most stations are already fully accessible for people with reduced mobility. As of recent data, only 8 out of 192 stations are not fully accessible. This includes stations like Clot on Line 1 and Espanya on Line 1 and 3. Improvements continue to ensure that more people can navigate the city easily. 
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