Mar 16, 2012 - 4:30 PM
In Switzerland a motorway vignette is required to use motorways, they don't use toll booths. Information can be found on this page
, including a Map of Switzerland with the roads requiring the motorway vignette.
You don't need a vignette as long as you don't use motorways, but going from Zürich to Interlaken that wouldn't be the best choice, I guess.
Ask about the vignette when you rent a car. I don't know whether this is always included in the price of renting a car.
Enjoy your stay!