Line J: New journey info service on WhatsApp

Transilien is experimenting with "Mon info Trajet" for personalized real-time information on Line J.

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Since October 12, 2026, Line J is experimenting with "Mon info Trajet", a new service allowing personalized information to be received on WhatsApp for occasional or regular journeys.

The service aims to assist travelers with useful real-time information and is now accessible on an experimental basis on Line J.
For one-off trips, "Mon info Trajet" provides personalized information about the selected journey, including the reason for disruption, its impact, and the estimated time of traffic resumption. The service also offers walking guidance to the bus stop if a replacement bus is in use.
For regular commutes, users can set up alerts for their usual routes. These alerts, received up to 30 minutes before the journey, provide information on circulating or cancelled trains, as well as potential disruptions affecting the route.
To access the service, users can scan the QR code on dedicated posters or click the provided link, also available on Transilien.com. WhatsApp must be installed on the user's phone.
"Mon info Trajet" complements existing information channels, such as the Île-de-France Mobilités website or app, Transilien.com, SNCF Connect, and the X account @LIGNEJ_SNCF.
Based on information from the official source: Transilien – Ligne J (20/10/2026)