From the airport "Leonardo da Vinci", follow the signs for ROME (Rome-Fiumicino motorway) and then exit to the ring road motorway (GRA), eastbound (direction, Napoli-Ciampino). Continue for about 15 km up to exit 20 on the ring road "Universita'-Romanina". Keep the right line and exit first right and following the yellow "Torrenova" and Romanina sign.
Continue until the traffic lights after about 2.9 km. Turn left on Via di Via di Passo Lombardo (deviation because of the works) for about 700 metres and turn right following signs to CNR / Policlinico / Banca d'Italia, then at the first roundabout follow indications INAF / CNR. At the second roundabout take the first exit on the right and at the second roundabout turn first right and after about 50 meters turn right again on Via del Fosso del Cavaliere: the entry of the Area Research Tor Vergata - CNR is 200 meters on the right.