From Zurich: motorway A1 towards Bern
From Geneva/Bern: motorway A1 towards Zurich
From Basel: motorway A2/A1 towards Bern
Change to A5 towards Solothurn/Biel at the interchange Luterbach (41).
Take the exit Solothurn West (31) and follow the road (Gibelinstrasse).
Go straight at the first round-about (2nd exit, Weissensteinstrasse).
Turn left at the next traffic lights (Weissenstein).
Find ZEVAC after approx. 400m on the left side in a larg industrial building.
Parking address for GPS: Solothurn, Weissensteinstrasse 81