SNCF Réseau is the French national railway infrastructure manager, responsible for the maintenance and development of the railway network in France. It operates under the umbrella of SNCF, the French National Railway Company, and ensures the safe and efficient functioning of train services across the country. The organization manages over 29,000 kilometers of railway lines, including high-speed and regional routes. SNCF Réseau also coordinates with various train operating companies to facilitate passenger and freight transport, playing a crucial role in the overall transportation system in France.