The Grand Paris Express is a major public transportation project aimed at expanding the metro system in the Île-de-France region, particularly around Paris. It will add approximately 200 kilometers of new rail lines and 68 new stations, enhancing connectivity and reducing travel times for residents and commuters. This project is designed to improve access to key areas, including business districts and suburban neighborhoods. The Grand Paris Express is expected to support economic growth, promote sustainable transport, and alleviate congestion in the existing Paris Métro system, making it a vital infrastructure development for the future.