Madrid's Line 6 Is Getting Driverless Trains: Here's What Changes

Line 6, the grey circular line that loops around central Madrid, is moving toward driverless operation. The first of 48 new automatic trains has now started testing, but the important commuter detail is this: the revolution is not in passenger service yet.

The first train is running trials at a CAF test centre in Navarre. The first units are due to reach Madrid from July 2026 for more testing. The passenger-service target published by the Comunidad de Madrid is 2027.

The Comunidad de Madrid confirmed on May 18 that the first automatic train destined for Line 6 has begun track testing at the CAF Track Test Center in Corella, Navarre. CAF is the manufacturer building the new fleet.

These tests check the train before it reaches a passenger line: braking, acceleration, communications, safety systems, and how the train will integrate with Metro de Madrid infrastructure.

A second unit is expected to arrive at the Corella test centre in June. From July, the first two complete six-car trains are due to move to Madrid, where they will begin night-time trials in manual mode on lines 10, 11, and 12. Later, once the necessary Line 6 infrastructure works are ready, testing will move to Line 6 itself in automatic circulation.

The order covers 48 new trains, with a total investment of 531.2 million euros. They are being built at CAF's plants in Beasain and Irun.

Each train has six connected cars and no driver's cab. That removes the usual closed front compartment and creates more usable passenger space, including a front-facing window for riders.

The headline specifications are:

Speed: up to 110 km/h, around 33% higher than the current trains. On a metro line, the commuter benefit is less about top speed and more about smoother operation, better acceleration, and more consistent service.

Frequency: automation is expected to allow trains every two minutes at peak times.

Capacity: each unit will carry up to 1,385 passengers, including 165 seated places. The Comunidad says the new layout gives up to 17% more space for users.

Energy: the new fleet is expected to be 20% more energy efficient than the current trains.

Access and comfort: the trains will include air conditioning, CCTV, mobile charging points, wheelchair spaces, areas for bicycles and pushchairs, acoustic and visual information systems, and an inductive loop for hearing-aid users.

Driverless trains need more than new rolling stock. Line 6 also needs station, signalling, communications, power, and depot upgrades.

The most visible passenger-facing work is the adaptation of platforms for automatic platform doors. The Comunidad de Madrid is spending 8 million euros to adjust platforms across the 28 Line 6 stations so the doors can be installed and aligned safely with the new trains.

The wider Line 6 automation programme is much larger: more than 1 billion euros, including the new trains, platform-door installation, signalling work, and infrastructure renewal.

The Laguna depot is also being modernized so it can handle the new driverless fleet, including automatic operation on most of its train tracks and updated communications with Metro's central control systems.

• May 2026 - the first automatic train begins testing at CAF's track centre in Corella, Navarre.
• June 2026 - the second unit is expected to arrive in Corella.
• From July 2026 - the first two six-car trains are due to move to Madrid for night-time manual testing on lines 10, 11, and 12.
• 2027 - the new trains are expected to begin operating on Line 6, and Line 6 is expected to become Madrid Metro's first driverless line.

The key correction for commuters: there is no official passenger-service date in late 2026. The latest Comunidad de Madrid wording points to service in 2027.

In the short term, your normal daytime Line 6 journey does not suddenly change because a test train is running in Navarre.

The works do matter, though. Line 6 has been going through a major upgrade, and current platform works are being coordinated with early closure windows from Sunday to Thursday. If you use the line late at night, check Metro de Madrid's official service updates before assuming the usual last-train pattern.

Once the new trains enter service, the difference should be easier to notice: more interior space, platform doors, shorter waits, better accessibility, and eventually no driver in the cab.

The full benefit depends on the whole system being ready. A driverless train is only one piece. The line also needs the platform doors, signalling, communications, depot systems, and control software to work together reliably.

Line 6 is the busiest line in the Metro de Madrid network, with more than 400,000 daily users. It also acts as a connector between major interchange points such as Moncloa, Nuevos Ministerios, Avenida de America, Diego de Leon, Pacifico, Legazpi, Plaza Eliptica, Principe Pio, and Cuatro Caminos.

That makes it a good candidate for automation: small frequency improvements can affect a lot of people, and a more reliable circular line helps journeys that do not start or end in the city centre.

The upgrade also sets a precedent. If Madrid can automate its busiest circular line without breaking daily mobility, it becomes easier to imagine similar technology being considered elsewhere in the network later. That does not mean another line is next tomorrow. It means Line 6 is the test case.

The first automatic Line 6 train is real, and testing has started. The first units should reach Madrid from July 2026. But passengers should think in terms of 2027 for the actual service change.

For now, Line 6 is still Line 6: busy, useful, and under construction around the edges. The driverless future is close enough to plan around, but not close enough to change your commute this week.