Bonne Nouvelle station

Bonne Nouvelle is a station on Lines 8 and 9 of the Paris Métro. The section of both lines from just east of Richelieu – Drouot to west of République was built under the Grand Boulevards, which replaced the Louis XIII wall and is in soft ground, which was once the course of the Seine. The lines are built on two levels, with line 8 on the higher level and line 9 in the lower level. The platforms are at the sides and the box containing the lines and supporting the road above is strengthened by a central wall between the tracks. There is no interconnection between the lines at Bonne Nouvelle, with each level having different accesses to the street; however, passengers may pass between levels in order to make connections.

Source: Wikipedia