The Institut Pascal (IPa) is located on the Université Paris-Saclay campus, on the "Plateau du Moulon", in the new "Quartier de la Physique". Its address is 530 Rue André Rivière, 91400 Orsay. The exact location is here

https://www.transilien.com/fr/page-lignes/ligne-b

The following map shows the many ways to reach the IPa by public transport from the train station and with the bus 🚍.

From the 2 hôtels Residhome & Hotel d’Orsay:

accomodation plan hotels v3 pptx.pdf

For your diner 🍽—> Les cèdres (Crous) for the evening (accept credit card only) (5-10euros ) open from 6:00pm to 9:30pm ! (Not include in the package of the Institute Pascal)

🚆 Recommended route (the simplest, no bus needed)

1. From CDG Terminal 2 (or Terminal 1 via the CDGVAL shuttle), take the RER B in the direction of “Saint-Rémy-lès-Chevreuse.”
   • Make sure you board a train going all the way to Saint-Rémy-lès-Chevreuse (and not to Robinson).
   • Check the station screens: the final destination must read Saint-Rémy-lès-Chevreuse ✅.
2. Get off at “Le Guichet” station.
   • This stop comes two stations after “Orsay-Ville.”
   • The full journey from CDG takes about 1h10 – 1h20.
3. Walk to the Institut Pascal.
   • It’s about a 10-minute walk from Le Guichet station.
   • The Université Paris-Saclay campus is signposted; follow Rue du Guichet → Avenue de la Vauve until you reach the Institut Pascal.

💡 Practical tips

• 🎫 Ticket: buy a single ticket CDG ↔ Zone 5 (Le Guichet), around €12. No need to buy another ticket in Paris.
• ⏱️ Trains run every 10–15 minutes during the day.
• ⚠️ In the evening or on weekends, there can sometimes be delays due to maintenance on the RER B. It’s a good idea to check the RATP or Transilien SNCF app on the day of travel.