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PSI is located in northern Switzerland, approximately midway between Zürich and Basel. The nearest towns and railway stations are Baden and Brugg. Frequent air and train connections via Zürich or Basel are available from all major European cities.
Follow the Koblenz–Zurzach signs through Brugg. After passing through Lauffohr and a short hill, branch off to the left towards Remigen/Villigen; then after about 500 m turn right towards Villigen. Approximately 1 km after leaving Villigen you will reach PSI-West. You can drive to PSI-East via the bridge over the river Aare.
Follow the Koblenz–Zurzach signs through Baden. Drive through Nussbaumen, Untersiggenthal and Station Siggenthal. Approximately 1.5 km beyond the roundabout, follow the sign left towards PSI at the crossroads and you will reach PSI-East. You can drive to PSI-West via the bridge over the river Aare.
Programming of the navigation system:
For PSI West: enter city "Villigen", street "PSI"
For PSI East: enter city "Würenlingen", street "PSI"
It is permitted to use the connecting road across the river Aare.