Montpellier's main train station, Montpellier-St. Roch, is located in the center of the city. It is serviced by a TGV connection from Paris, Lille, Lyon or Nice. A tram station is situated in front of it.
From the city center, take the tram line 1 to St Eloi (about 15 mn from railway station), then the Navette Agropolis bus (stop in Docteur Pezet street), up to Agropolis stop.
From there, walk along Agropolis avenue to the North past the main CIRAD entrance, until you reach a large roundabout. Walk around the roundabout on the left, then turn on the de la Lironde Boulevard, on the opposite side. Less than 100 m from the roundabout, turn left in the 2nd entrance ot the Parc Scientifique Agropolis. PS1 and PS2 buildings are at the end of the street.