Google Map (the building is not in the satellite image and is north of the A marker)
The PCRI building is located on the Plateau de Saclay at:
Rue Noetzlin 91190 Gif-sur-Yvette
This website will give you some help on options for how to get there: http://www.transport-idf.com
Options from Paris
If you are coming from Paris, take the RER B and then we recommend to get off at Massy Palaiseau and to take the bus from there:
From Massy Palaiseau to PCRI
Take the RER B to Massy Palaiseau and then bus 91-06B,91-06C or 91.10. At Massy Palaiseau look for the signs that point towards the bus stops (see this image or this image for visual directions). Get on the right bus and off at Moulon.
At Moulon face the direction the bus is going, then take the first right and walk a few minutes. You will see the PCRI building across the road.
In this picture Moulon is located at A and the new building is now located north of marker B (the satellite image was taken before construction).
Alternative: From Le Guichet to PCRI
It is also possible to get to PCRI from the Le Guichet station where buses are a little faster but less frequent (that's why we recommend the above option). Nevertheless, if you are interested, here is the alternative:
Take the RER B to Le Guichet and take bus 269-02 (the pink one in the image above) in direction Gare de Jouy en Josas or CEPR, get off at IUT Pôle d'Ingénierie.
At Le Guichet - Finding the right bus stop:
Follow the sign Gare routière. When leaving the RER coming from Paris, turn right and take the tunnel to cross the rails. When leaving the station turn right again and follow the street down towards the bridge. Before the bridge there is a small pathway on the left leading down to another street. The bus stop is on the other side of that street. Get off the bus at the second station.
At Le Guichet - If you feel like walking:
Coming from Paris, start by crossing the rails by the underground pass. Then, take Rue de Versailles (perpendicular to the rails) in front of the train station for two blocks. Turn left in Rue de la Colline, which goes up hill. When you reach the end of that street (almost at the top), continue right in Chemin du Bois des Rames. Keep going on that direction into Rue Nicolas Appert. Turn left in Rue d'Arsonval and continue until joining Rue Noetzlin. The nearest bus station is "Moulon". Assume 25-30 minutes walk depending on your shape.