The construction of this double track country line, which follows the valley of the Ourcq, between Meaux and Reims made possible a direct route from Paris to Reims (156 km), shorter than via Epernay (173 km). The line was opened in 1894.
The line leaves the Paris - Strasbourg main line at Trilport (PK 51) and serves the villages of Lizy-sur-Ourcq, Crouy-sur-Ourcq, Mareuil-sur-Ourcq, La Ferté Milon (PK 80) Ouchy-Brèny, Fere-en-Tardenois, Bazoches (PK 125) (junction on the Reims-Soissons line).
The electrification of Epernay - Reims reduced the importance of the shorter, but slower route via La Ferté Milon. That line remains open, however, as a useful diversionary route.
By 1975, the passenger services between Reims and La Ferté Milon were operated by road transport.
By 2007 the actions of the regional governments of Champagne-Ardennes Region and the Ile de France Region had revived, a little, the passenger rail services. The cut off point is the small town of La Ferté Milon. This is placed in the Transilien Ile de France network and commuter services are provided morning and evening between that town and Meaux and Paris-Est.
The occasional autorail is provided in the middle of the day between Reims and La Ferté Milon and Meaux on Wednesdays, Saturdays and Sundays. But the lightly populated agricultural area east of La Ferté Milon provides little business for the infrequent trains.