Map

By public transportation

• Go to Massy-Palaiseau, a major public transportation node 15km South-West of the city center, mainly accessible through the RER B and RER C rapid transit lines, both of which are within easy reach from anywhere in the city of Paris, including all long distance train stations.

Direct RER B trains are available from Roissy Charles de Gaulle airport (from Orly airport, use local transit train ORLYVAL to reach RER B at station ANTONY).

Note that a few TGV trains stop at Masy-Palaiseau TGV, a 2 min walk from Massy-Palaiseau RER B.

• From Massy-Palaiseau, use bus lines 91-06B, 91-06C or 91-10 (bus stop alongside the RER B track) to station "Ecole Polytechnique (D128)". The bus stop is in front of Institut d'Optique. Busses run frequently week days 7:00-19:00. (Hikers may use station "Lozère" rather than Massy-Palaiseau and go for a 25 minutes uphill walk).

Note : special fares apply to all RER rides outside the city of Paris. Purchase a ticket to Massy-Palaiseau. On bus 91-06B, 91-06C and 91-10, use a "t+" urban metro ticket or purchase a ticket from the driver.

By road

• From A6-A10, exit at "Cité Scientifique" on the left lane to N444, then "Saclay" to D36, take first left to D128, Institut d'Optique is at the next intersection.
• From Paris (Western quarters) use N118 from "Pont de Sèvres", follow "Nantes-Bordeaux" to exit 9 "Centre Universitaire", then follow signs to "Ecole Polytechnique". Institut d'Optique is located at the West entrance of École Polytechnique