From Massy-Palaiseau RER B station: get on either bus 91.06 or 91.10 until bus stop MOULON
From Le Guichet RER B station: get on bus 9 until the stop called MOULON
N118, Exit n°9 « Centre Universitaire». At the round about, take the 2nd exit (straight ahead). Many parking spots are available on campus, especially within the two underground parking lots located under the Bouygues and Eiffel buildings (see map).