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There are three operation modes:
• "Single shuttle" (one single train operating through one tunnel; that's
for low demand times)
• "Double shuttle" (two single trains operating each through their own
tunnels; this is said to have the highest capacity; it is essentially two
Single shuttles operating indpendently)
• "Long loop" (reversing at the stops; this is the most convenient for the
passengers, as they always board at the same platform)
I believe there are sufficient cars available to form three trains butActually, in order to comply with the Schengen / Non-Schengen segregation,
they purchased three additional cars, allowing for three-car trains.
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