Institut de Physique Théorique
Direction de la Recherche Fondamentale  -  Saclay
UMR 3681 - INP
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Monday, June 25, 2018

How to reach us

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Access from train stations and airports

IPhT is located 20km south-west of Paris, in a place called Orme des Merisiers (see map).

How to reach us by train and bus

  • RER B Le Guichet + Bus:
    From Paris or Charles-de-Gaulle airport (or Orly airport via Orlyval and Antony station), take the train RER B direction Saint-Remy-les-Chevreuse. You might have to change train in Pais if you come from CdG.
    The simplest is to take a train to Le Guichet (approx. 35 minutes from Paris, 1h15 from Charles-de-Gaulle, make sure your train stops there). Off at le Guichet, take the pedestrian underpass at the front of the train. Turn right after the café and cross the street. A pedestrian way on the left leads to the bus station.
    Bus 9 (the default bus at this station) leaves every 15 minutes and reaches Orme des Merisiers in approx. 10 minutes.
    This bus is free with a weekly or monthly pass "Navigo"; otherwise, tickets can be purchased on the bus; if you have subway tickets for Paris (ticket t) you can also use those.
  • RER B Massy-Palaiseau + Bus:
    The second option is to take the train RER-B to Massy-Palaiseau (approx. 25 minutes from Paris, 1h05 from Charles-de-Gaulle) and take bus 91.06B, 91.06C or 91.10 which reach Orme des Merisiers in 20-25 minutes. Trains are more frequent, buses are more frequent at rush hours but they are also more crowded, and there are many buses lines in Massy so that finding the right bus stop is not easy the first time.
  • The optimal route (through Le Guichet or Massy-Palaiseau) depends on the time: check (enter "Orme des Merisiers, Saint-Aubin" as "Arrival point"). If you are staying for a while, we recommend that you download the apps RATP (real-time information on trains) and Vianavigo (trains and bus schedules, no real time information so far).
  • Entering the Site:
    Exit the bus at Orme des Merisiers. There is a gate for pedestrian access right in front of the bus stop, but if you don't know the way, you should rather use the main entrance, which you don't see from the bus stop: It is located 150m ahead. Once you enter the site, go straight at the fork, not right (this is the entrance to the Soleil synchrotron). IPhT is building 774 at the end of the road on the right side (approx. 10 minute walk from the bus stop).



Local road map

How to reach us by car

Warning! There are presently heavy road and building works going on around IPhT. Open roads and traffic conditions may be changing.

Determine the best route with mappy or via Michelin. As arrival point, fill in Route de l'Orme, town Saint-Aubin, zip code 91190. Enter Orme des Merisiers and go straight at the fork, not right (this is the entrance to Soileil synchrotron facility). IPhT is located at the parking lot right and end of the road.


Local trail map (from La Hacquiniere to IPhT)


How to reach us by walking from Bures sur Yvette (La Hacquinière) or Gif sur Yvette

You can reach IPhT directly by walking from the train stations of La Hacquinière or Gif-sur-Yvette on RER B. This requires both a valid access badge to Saclay and a good knowledge of the neighborhood. But the gate beside the swivel is generally open during the business hours.

It is not a valid option on your first visit. The walk includes a steep forest path uphill, which can be very muddy, thus take good shoes. It takes about 30 minutes for an experienced hiker to reach IPhT from La Hacquinière (see map).


    page n° 388, actualisée le 12-09-2016 13:42:39  par david

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