Recall that in Italy, before getting on the train, you must stamp your ticket by using those small yellow machines available within the station. The Department is at walking distance from the railway station. To reach the Department, you should basically leave the station and walk straight ahead for approximately 10 minutes. The Department is in this road, at number 40, on the left side. Please note that Pisa is a small town with several pedestrian areas.
Parking is a bit of a problem and most parking areas are with pay-meters.