RER

The RER lines, for Réseau Express Régional, are different from other train lines because they do not terminate in Paris, but cross the capital underground, allowing passengers to travel from one end of the region to the other with the same transport line.

Key-figures

  • 5RER lines
  • 600km of tracks throughout the region
  • 249Stations served
  • 2,7million daily passengers
  • +20%attendance in 10 years

At your service

  • Presentation

    The Île-de-France Mobilités network has 5 RER lines that cross the entire Île-de-France.

  • Improvement projects

    Modernisation of infrastructure, line extension... Discover the works and projects that make up the RER of tomorrow.