u/Minatoku92

Renault SC10 R was built between 1981 and 1989 and was operated until 2002 in Paris. The R stand for Restyled because it's the modernized version of the Saviem (and then Renault) SC10 produced since 1965. In the mid 1980s, over 90% of Parisian buses were SC10 or SC10R.

Heuliez GX317 was built between 1994 and 2005. It operated in Paris bus network between 1995 and the late 2010s. It's among the first low floors buses in Paris bus network.

In April 2026, the replacement of switches on Line 4 required the closure of the line between Châtelet and Barbès–Rochechouart. The southern terminus of the northern section of Line 4 was Barbès–Rochechouart, where the reversing switch is located just north of the station.

This explains how two trains can arrive at the same time on stations: one arrives from the north to let passengers disembark, while the second returns to the boarding platform to pick up passengers before heading north again. For better passenger flows, the operator chosed to use separate platforms for boarding and disembarking.