From Paris Porte d'Orléans : Follow A6 motorway (south direction) then A106 to Orly.
SILIC MAP
A106, exit at ZONE DELTA (service station) And follow RUNGIS-SILIC roadsign Railway station EXIT : RUNGIS LA FRATERNELLE RER line C to Massy Palaiseau
A106, exit at ZONE DELTA (service station)