• I'm at work... ironically.

    I was on a double-decker RE to Friedrichshafen, in September, and I didn't find it particularly comfortable (cramped, I would agree) but they're fine for shorter journeys.

    Re voltage, I think new trains can be configured to operate at different ratings.

    In terms of track gauge, most of Europe uses Standard which is 1435mm (4ft). Russia/former Soviet states uses 5ft (~1520mm), Ireland 1600mm and Iberia a whopping 1668mm.

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