Turn off E4 at exit 126 ("Trafikplats Strömsfors") about 15 km north-east of Norrköping (20 km from the central Norrköping).
Follow the signs to Krokek. After the railway station on the right hand, drive on for about 500 m. Turn right onto Polisvägen, then left and you see the main entrance of Pivab.
By train or bus: Timetables at www.resplus.se. The nearest station is Kolmården station in the center of Krokek. You may also go by bus 433 from Norrköping.