In this article you will find information on requirements for adhesive vignettes for:
All vehicles up to and including 3.5t are required to have a vignette properly attached (find more information on how to attach it here) to the vehicle on toll roads in Austria.
All vehicles exceeding a total weight of 3.5t require a device for automatic toll collection in Austria, which you can purchase e.g. from ASIFNAG.
All trailers towed by a motor vehicle with a maximum permissible gross weight up to and including 3.5t (including sidecars on motorbikes) do not require an additional vignette or a toll device in Austria. A valid, properly affixed vignette on the towing vehicle is sufficient.
All vehicles up to and including 3.5 t are obliged to have a toll sticker properly affixed to the vehicle on toll roads in Switzerland (information on affixing can be found here).
Trailers of up to and including 3.5 t, which are towed by a motor vehicle subject to the vignette, require their own vignette.
Heavy vehicle charges must be paid for all vehicles and trailers that exceed a weight of 3.5 t each.