The Grand Paris Express project consists of 200 kilometers of new, fully automated metro lines, 68 new stations, and four new orbital lines (15, 16, 17, and 18), in addition to the extension of Line 14. The network is being delivered in phases between 2024 and 2031: Line 14's 8 stations are fully operational following its 2024 extension, Line 18 is the most advanced of the new lines, with testing underway ahead of its first opening, and civil engineering is largely complete on many sections, with tracks, systems, architectural fit-out, and testing now progressing station by station. Each of the 68 stations is assigned to a specific architect or architectural team, sometimes in collaboration with landscape architects for above-ground elements.
