How are driverless trains controlled?

Autonomous trains operate on tracks shared with other vehicles and pedestrians. They rely on digital signalling, but they require additional powerful sensors to analyse hazards around them and processors that enable them to adapt and even make decisions. Autonomous trains do not need a driver or attendants on board.



Driverless trains in 2026 operate using a system known as Communication-Based Train Control (CBTC), which functions at Grade of Automation 4 (GoA4). Unlike traditional trains that rely on fixed track "blocks," driverless trains use high-speed radio data to communicate their exact position and speed to a central control center in real-time. This "moving block" system allows trains to run much closer together safely. Onboard computers handle the acceleration, braking, and station stopping by following a pre-programmed "braking curve." The doors are synchronized with Platform Screen Doors (PSDs) at the station to ensure passenger safety. While there is no driver in the cab, the trains are monitored 24/7 by human controllers in a remote operations room who can take manual control via a digital link if an obstruction is detected by the train’s LiDAR or infrared sensors. This automation significantly reduces human error and allows for higher frequency service during peak hours.

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Autonomous trains operate on tracks shared with other vehicles and pedestrians. They rely on digital signalling, but they require additional powerful sensors to analyse hazards around them and processors that enable them to adapt and even make decisions. Autonomous trains do not need a driver or attendants on board.

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Automatic train control (ATC) is a general class of train protection systems for railways that involves a speed control mechanism in response to external inputs. For example, a system could effect an emergency brake application if the driver does not react to a signal at danger.

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“Safety will be heightened given the always-on nature of the systems and huge pools of data will mean systems are constantly learning, growing and becoming even more intelligent. Driverless trains, and autonomous vehicles more broadly, aren't prone to human error and are therefore inherently safer.”

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The position of the train driver differs from that of the conductor in that the former is in charge of running the locomotive while the latter manages the cars, including the crew, passengers and their activities.

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The world's first automated, driverless train has been unveiled in Germany's Hamburg.

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Deutsche Bahn and Siemens have developed the world's first train that runs by itself, the two groups said in a statement. The technology does not require a specific track as the autonomous train runs on the same network as those operated by drivers.

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Fully automated trains have been around a surprisingly long time – the first opened in Kobe, Japan, in 1981, and they now operate in over 40 cities around the world, including Copenhagen, Paris, Singapore, Dubai, and London.

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Here are some illustrative examples: One of the main difficulties lies in the complex interaction of the various subsystems when the train is running: monitoring the status of the railway track, the position of other trains and the physical integrity of the train, and determining the space required to brake safely.

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The driverless Shinkansen tests have so far taken place on the northernmost section of the Joetsu Shinkansen Line, which is not used by commercial traffic. This 5km-long section runs from Niigata station to the stock depot at Higashi-Niigata.

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China's first commercial driverless sky train begins trial run in Wuhan's hi-tech park. The Chinese city of Wuhan began testing a driverless sky train in its hi-tech park on May 9, 2023. The country's first commercial sky train is expected to open to the public later in the year.

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