You can reach Trieste by train (www.trenitalia.com) and then walk from Trieste Railway Station to Piazza Oberdan (5 min. on foot), where you can catch the buses to SISSA - Via Bonomea.
Several buses arrive close to or to SISSA:
Bus n.38 leaves from Via Galatti (in front of Piazza Oberdan, see map) and stops just opposite SISSA main entrance
Bus lines 2 and 4 arrive close to SISSA.
Bus n.2 (Opicina's tram) and n. 4 leave both from the side opposite to Piazza Oberdan; you have to get off at Obelisco (ask the bus driver) and then walk down Via Bonomea for a pleasant 10 minutes' walk to reach SISSA.
Find the updated schedules for all the bus routes on Trieste Trasporti website. This utility allows you to check bus routes (linee) and to plan the journey (calcolo percorso).
We provide a small handbook for those who have problems reading Italian.
Tickets must be purchased beforehand at newsstands or tobacconists or tickets machines on Trieste streets and must be validated using the machines on the buses.
There are single-run tickets, 10-run tickets or transit pass (biweekly, monthly, for the whole buses transport system). It's not possible to buy tickets on board.