IJCLab is located on the Orsay campus of the Paris-Saclay University, 25 kilometers south-west of Paris. The easiest way to reach the Orsay campus is by taking the RER B line to the Orsay-Ville station (about 35 minutes from the main Châtelet station in Paris center; and at least 1 hour from Roissy Charles de Gaulle airport).
At the RER station, take the RER B going south-bound to Saint-Rémy-lès-Chevreuse (and not to Robinson) and get off at Orsay-Ville.
Please do not mistake the RER B station « Orsay-Ville » for the Paris metro station « Musée d’Orsay ». From Paris or airports, you must buy a ticket specifically for « Orsay-Ville ». A Paris metro ticket is not valid on any RER line outside Paris intra-muros!
Tips (You will find maps, time tables, etc.) about metro and RER are here.
If you plan to stay longer, there is a special ticket called « ParisVisite » for one, three or five consecutive days.
From train stations in Paris
The main train stations are connected to the Metro/RER transportation network going to Orsay-Ville.
The price for a RER ticket from Paris-Center to Orsay-ville is around 3.5 Euros for a single trip.
From the Paris airports
From Charles de Gaulle airport
RER station is located at « Roissypole », linked by the free CDGVAL light rail:
- From Terminal 1: The RER station is not located inside Terminal 1. Take the CDGVAL light rail (5 minutes journey) to « Terminal 3-Roissypole ». CDGVAL station for Terminal 1 is located at level 2;
- From Terminal 2: RER station is underneath Terminal 2, between Terminal 2C/2E and 2D/2F. Go to the rail station by walk (look for « Paris by train » or « Gare » signs) or board free shuttles;
- From Terminal 3: The RER station is not located inside Terminal 3. Look for « Paris by train » signs (follow the signposted footpaths). RER station is 400 meters away from the terminal (5 minutes walk) .
At the RER station, take the RER B going to Saint-Rémy-lès-Chevreuse (and not to Robinson), getting off at Orsay-Ville.
From Orly airport
Take the Orlyval (automatic rail link connecting to RER line B) to the Antony station and then transfer to the RER B going south-bound to Saint-Rémy-lès-Chevreuse and get off at Orsay-Ville.
By road from Paris
If you leave Paris from « Porte d’Italie » or « Porte d’Orléans », take the A6 autoroute in the direction of Lyon ; on the autoroute, after 10 km, follow in the direction of « Bordeaux » ; after another 10km, take the Orsay exit and follow panels to reach Orsay and « Faculté d’Orsay ». After this, look up in a local map to find IJCLab.
If you leave Paris from « Pont de Sèvres », take the N118 in the direction of « Bordeaux », after 30 km, exit at Orsay. Then, follow « Faculté d’Orsay » or find the RER-B train station « Orsay-Ville ». After this, look up in a local map to find IJCLab.
In principle, going to Orsay from Paris in the morning is « against the flow of commuters»: « pros » do the trip in 30 mn ! (Speed is limited to 110 km/h on suburban autoroutes, 90 km/h on national roads, 50 km/h (and even 30 km/h in some areas) in town).
- Latitude: 48.70
- Longitude: 2.17
Google Map location of the Lehmann Auditorium (building 200):
From the "Orsay-ville" RER B station
Exit the station using the 3rd exit (« rue de la Chaufferie - Université Parais-Saclay »), a tunnel that crosses back under the railway. Then follow the instruction on the attached document in the Overview page.
From the "Bures sur Yvette" RER B station
Exit the station using the 1st exit (« Impasse de la station »), a tunnel that crosses back under the railway when coming from Paris, or straight at the exit from south of Orsay (Gif-sur-Yvette, Saint-Rémy-lès-Chevreuse). Then follow the instruction on the attached document in the Overview page.