This summer, the buses are changing in Saint-Germain-en-Laye!

From July 13, 2026, several bus lines will operate in Saint-Germain-en-Laye. Adjusted routes, simplified services and reinforced connections improve the readability of the offer and facilitate your travel throughout the municipality. What are the main changes to be aware of?

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A new bus offer that hits the nail on the head.

In Saint-Germain-en-Laye, the bus offer is changing:

  • More simplicity with redesigned and more direct routes
  • More buses at times you need them
  • Making it easier to get to train stations, schools and more
  • More legibility thanks to a complete renumbering of the lines of the Saint Germain Boucles de Seine territory

In Saint-Germain-en-Laye, lines R1, R2N, R2S, R3N, R3S, R4, R5 and 10 give way to lines 6301, 6302, 6304, 6305, 6306 and 6307.

Equivalence of lines, old lines - new lines.

6 new, clearer and more connected lines

The new lines in Saint-Germain-en-Laye will improve the service to schools, the legibility of the offer thanks to more direct routes, the bus-tram-RER connection by making the Bel Air station one of the central points of the territory.

They will also offer access to the Centre Hospitalier Intercommunal de Poissy - Saint-Germain-en-Laye.

Schematic plan of future connections in Saint-Germain-en-Laye

Your new lines in detail

Lines 6301 and 6302 take over the routes of lines R1, R2N and R2S, with:

  • Service to the main schools in Saint-Germain-en-Laye
  • Access to Saint-Germain-en-Laye station and T13 stations: Bel Air and Grande Ceinture - Lisière Pereire
  • An increased frequency of service with a bus every 5 to 7 minutes during peak hours during school periods
  • Buses from Monday to Sunday, all year round
Schematic plan of lines 6301 and 6302

Line 6304 is the merger of lines R4 and 10, with:

  • A Marly-le-Roi ↔ Chambourcy link via Saint-Germain-en-Laye, without connections
  • Access to the Centre Hospitalier Intercommunal de Poissy - Saint-Germain-en-Laye all day in summer and during off-peak hours the rest of the year
  • The maintenance of existing school services on lines R4 and 10
  • Buses from Monday to Sunday, all year round
Schematic plan of line 6304

Line 6305 connects the west of Saint-Germain-en-Laye to Saint-Germain-en-Laye station via Bel Air station, with:

  • The service of the Lycée Léonard de Vinci, the Institut Notre-Dame, and the Sub-Prefecture of Saint-Germain-en-Laye
  • A bus every 15 minutes during peak hours and 30 minutes during off-peak hours
  • Buses from Monday to Sunday, all year round
Schematic plan of line 6305

Line 6306 connects Bel Air station to Saint-Germain-en-Laye station, with:

  • Service to the Hospital district and the Administrative Centre of Saint-Germain-en-Laye
  • A bus every 20 minutes during peak hours and every hour during off-peak hours
  • Buses from Monday to Sunday, all year round
Schematic plan of line 6306

Line 6307 connects the Lycée Léonard de Vinci to the station of Saint-Germain-en-Laye, via the station of Mareil-Marly, with:

  • The service to Mareil-Marly and the south of Saint-Germain-en-Laye
  • Access to the Lycée Léonard de Vinci and nearby schools
  • A bus every 20 minutes during peak hours and every hour during off-peak hours
  • Buses from Monday to Saturday, all year round
Schematic plan of line 6307

To find out more about access to schools in Saint-Germain-en-Laye, click below.

And line numbers that are (finally) becoming unique

In parallel with the changes affecting the heart of the territory, several lines are simply being renumbered.

New numbers of the other lines in the territory of Saint Germain Boucles de Seine.