Due to a signal failure at Châtelet-Les-Halles, traffic is currently interrupted this Thursday, December 7, 2023, on the RER B between Luxembourg and Paris Gare du Nord, as well as on the RER D between Paris Gare de Lyon and Paris Gare du Nord. The estimated resumption time is now 6pm. On the other hand, traffic is resuming on RER A, but remains very disrupted on the entire line, warns RATP.