Luxembourg is proud to be the first country in the world to offer nationwide free public transport. Since 01/03/2020, your travels are a lot easier: you no longer need a ticket to board any national bus, train or the tram. However, first class train tickets and passes remain valid and there is no change or discount for them.
Free public transport ends at the border. This is why cross-border tickets have been reassessed. Commuters from neighbouring countries benefit from reduced fares!