Razel-Bec's teams took part in this project by digging a 4 km tunnel in the municipalities of Thiais, Rungis, Chevilly-Larue and L'Haÿ-les-Roses, building 3 stations (L'Haÿ-les-Roses, Chevilly-Larue and Thiais-Orly) and three ancillary structures, and developing 5 stations (Maison Blanche, Hôpital Bicêtre, L'Haÿ-les-Roses, Chevilly-Larue and Thiais-Orly). Finally, the development of 5 stations: Maison Blanche, Hôpital Bicêtre, L'Haÿ-les-Roses, Chevilly-Larue and Thiais-Orly.
Line 14 South now links Saint-Denis Pleyel to Orly Airport, making it the longest line in the metro network, with 21 stations and almost 30 km!