This article with give you the directions to Langstone campus by car.
Take the A2030 Eastern Road into Portsmouth (signed 'Portsmouth East') whether approaching from the east (A3(M)/A27) or the west (M27). (North bound if approaching from M27- ignore junction signed to M275.)
Continue along the A2030 through several sets of traffic lights to the junction by Liningtons Renault Garage. Turn left along Milton Road keeping in the left lane. After the zebra crossing take the fourth road left into Locksway Road just before the next set of traffic lights. Continue along Locksway Road and turn left into Furze Lane.