TER Grand Est or TER Fluo is the regional rail network serving the region of Grand Est, northeastern France. It is operated by the French national railway company SNCF. It was formed in 2016 from the previous TER networks TER Alsace, TER Lorraine and TER Champagne-Ardenne, when the respective regions were merged.

The Gare de l'Est, officially Paris Est, is one of the seven large mainline railway station termini in Paris, France. It is located in the 10th arrondissement, not far southeast from the Gare du Nord, facing the Boulevard de Strasbourg, part of the north–south axis of Paris created by Georges-Eugène Haussmann.