In Paris, a major expansion project is underway on the city’s metro system. The new Grand Paris Express Ligne 17 is expected to be completed by 2024, and will include nine metro stations on its nearly 17-mile (27 km) route, which will serve two major airports. Société du Grand Paris, the agency overseeing the new metro line, has chosen Benthem Crouwel Architects to design the new metro station at the Charles de Gaulle Airport, which boasts more foreign destinations than any other airport in the world.

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The Dutch architectural firm was chosen to design the metro station at Charles de Gaulle Airport in part because of their experience with aviation hubs. The firm has been the architect of Amsterdam’s Schiphol Airport, main the main international airport of the Netherlands, since 1982. In 1995, the team designed the underground train station at Schiphol, so they are primed to take on the largest international airport in Paris.

In addition, Benthem Crouwel Architects will also take on the job of designing three other above-ground metro stations and viaduct of the Ligne 18, which is the metro line that will connect Orly Airport and Versailles. Ligne 18 will stretch a total of 31 miles (50 km) with 13 metro stations along the way. That line is expected to open in 2023.

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The almost 17-mile Ligne 17 will cost $2 billion (1.8 billion euros) and will add nine new metro stations to the greater Paris area.

+ Benthem Crouwel Architects

Images via Benthem Crouwel Architects, Sébastien d’Halloy for Société du Grand Paris, and Didier Baertschiger