INSTN’s Saclay site, about 25 km from Paris, is located on the edge of the CEA’s Saclay center.
GPS coordinates (latitude-longitude): 48°43'26.2" N - 2°09'17.1" E
The entry to the Saclay center is on RD306 (direction Saint Aubin / Gif- sur-Yvette / Chevreuse), on the right turn in a roundabout, less than one kilometre from the "Christ de Saclay” roundabout. On entering the center, take the first road to the left before the guardhouse to access the INSTN.
Download the access plan
Personal vehicle
Coming from Paris - Porte de Saint Cloud
Take the Porte de Saint-Cloud and follow the “Bordeaux” signs.
Cross the Sèvres bridge and take the N118, following the “Bordeaux” signs.
Take exit 8 “Toussus-le-Noble / Saclay / Saint-Quentin”.
At the Christ de Saclay roundabout, take the N306 towards “Saint-Aubin / Gif-sur-Yvette / Chevreuse”. Turn right at the next roundabout.
Coming from Orly airport
Take the A106 towards “Paris”.
Take the A86, towards “Fresnes / Versailles”.
Take exit 30 “Bièvres / Le Petit Clamart / Igny / Clamart”.
Take the N118 towards “Saclay”.
Take exit 8 “Toussus-le-Noble / Saclay / Saint-Quentin”.
At the Christ de Saclay roundabout, take the N306 towards “Saint-Aubin / Gif-sur-Yvette / Chevreuse”. Turn right at the next roundabout.
Public transport
Link between Châtelet or Denfert-Rochereau and Saclay
At the RER station of Châtelet or Denfert-Rochereau, take the RER B line towards "Saint-Rémy-lès-Chevreuse" and get off at "Le Guichet" (the journey takes 25-33 minutes). Then take a No 9 bus and get off at "CEA porte Est - Raoul Dautry" (journey of 17 minutes), located at an intersection on the N306, 200 metres from the INSTN.
Consult the bus line 9 timetable
Link between Orly Ouest and Saclay
At Orly, take Orly Val as far as the "Antony” RER B station. Take the RER B connection towards "Saint-Rémy-lès-Chevreuse". Get off at "Le Guichet" and take a No 9 bus as explained above.
Link between Massy-Palaiseau station and Saclay
At the Massy-Palaiseau station (RER B or C), take a 91-06 B or 91-06 C bus (Massy - Saint Quentin link bound for Saclay plateau). Get off at "CEA porte Est - Raoul Dautry" (journey of 20 minutes), located at an intersection on the N306, 200 metres from the INSTN.
Consult the 91-06 bus line timetable
Plan of the Massy-Palaiseau station and of the Atlantis bus station: download
Useful links
Coaches for CEA personnel
Nearly forty regular coach lines providing transportation for CEA personnel serve various “portes” (city gates) in Paris and most of the Paris suburban districts.
The personnel is dropped off at 8h30 at the roundabout on the RD306 (East entry, 200 metres from the INSTN), or within the confines at the bus station where shuttles run to the INSTN (5-minute journey). In the evening, these coaches can only be used when a training course or session ends at 4.30 pm.
The timetables and routes of these coaches are obtainable from the teaching assistants or the continuing professional development organizers.
