Several lines in the rail network are taking advantage of this period to carry out major work. There is no train between Paris Saint-Lazare and Val-de-Reuil, Saturday all day and Sunday until 4 p.m.
Line 14 closes completely for a week starting Sunday. Line 2 is also under construction, between Barbès-Rochechouart and Père Lachaise. Check your itineraries carefully: between the closed stations and the cancellation of trains, the service is expected to be rather disrupted over the next 15 days.