RER A Summer work

Continue your journeys during the RER A closures thanks to the alternative routes!

Numerous tools are available to help you during the RER A closures. Discover our video of alternative transport to help you find your way around this summer!

The summer works on the RER A will result in closures from 26 June to 29 August inclusive. In order to accompany you and to enable you to continue your journeys, numerous substitutions and reinforcements of the transport offer on the metro and bus lines are being put in place. Discover them in this video!

A replacement bus provides a link between La Défense and Nanterre-Université, via Nanterre-Préfecture, on weekdays from 9pm and at weekends all day long, with a run every 3 to 4 minutes. It will also run all day from 9 to 13 and from 16 to 20 August.
The route planner available here and on the RATP app takes these works into account to help you plan your journeys. 
Our agents in stations are at your disposal to accompany you on your summer journeys!