Which Country has launched the World's First Automated Driverless Train?

Concept: Rail automation is graded by the Grade of Automation (GoA) scale: GoA2 means the train drives itself under Automatic Train Operation (ATO) while an on-board attendant supervises the journey and can intervene; GoA4 means it runs completely unsupervised, with no staff on board at all. Reaching even GoA2 on an existing shared mainline network, where an automated train mixes with regular human-driven traffic, is a much harder engineering problem than a GoA4 system built on a purpose-made, fully segregated track from day one.

Application: In October 2021, German rail operator Deutsche Bahn, working with Siemens Mobility, unveiled an automated train for Hamburg's S-Bahn network as part of the Digital S-Bahn Hamburg project; it entered passenger service from 2021-22 using Automatic Train Operation over ETCS to control acceleration, braking, and station stops, with an on-board attendant supervising the journey at GoA2, while the train also runs fully unsupervised at GoA4 for automated shunting and turnback moves at Bergedorf. This was widely reported as the world's first automated driverless train because, unlike earlier automated systems, it operates on the country's existing mixed-traffic tracks rather than a purpose-built segregated line — which is why Germany, not any of the other offered countries, is credited with this milestone.

Cross-check: Contrasting the offered options by their actual rail-automation record:

• Sweden — no comparable driverless-train launch of this kind is documented for this period; an unsupported distractor.

• France — genuinely holds an EARLIER, different rail-automation milestone: Lille's VAL network (opened 1983) is credited as the world's first automated METRO, but that line was purpose-built and fully segregated from ordinary rail traffic from day one — a separate historical fact from this stem's 2021 "driverless train sharing existing tracks" claim.

• Germany — the Hamburg S-Bahn train described above; matches the stem exactly.

• Japan — Kobe's Port Island Line (opened 1981) is a genuinely earlier automated system, but it is a purpose-built, fully segregated rubber-tyre guideway (Automated Guideway Transit / "people-mover" technology, the same class as Lille's VAL) rather than a train sharing a country's existing mainline rail network — a different class of achievement from Germany's 2021 milestone, which this current-affairs stem tests.