Toll Weight Class tzGm vs. GVW
Difference between TPM and GAW
The TPM is the technically permissible maximum mass set by the manufacturer (field F.1 of the Certificate of Registration Part I). The GAW is the permissible total weight according to registration (field F.2, e.g. after a down-rating). Both figures refer to the maximum mass with which a vehicle may be operated.
Read more: Difference: toll sticker vs. toll.
However, the two figures differ in their specific meaning:
TPM: Technically permissible maximum mass – Field F.1
The TPM refers to the technically permissible maximum mass of a vehicle as set by the manufacturer (field F.1 of the Certificate of Registration Part I).
The TPM is a fixed manufacturer value and does not change even if the vehicle is down-rated.
The TPM refers to the maximum mass that the vehicle can carry and move according to the manufacturer's technical specifications.
It takes into account the load limits of the vehicle components such as the frame, axles, wheels and brakes, and ensures that the vehicle can be operated safely without overloading these components.
GAW: Permissible total weight – Field F.2
The GAW describes the permissible total weight according to registration (field F.2 of the Certificate of Registration Part I). It may, for example, be lower than the TPM after a down-rating.
The GAW is generally set by law and must not be exceeded.
To ensure road safety and protect road infrastructure, it is essential to avoid overloading.
Change as of 1 December 2023
Since 1 December 2023, the TPM (technically permissible maximum mass, Certificate of Registration Part 1, field "F.1") has been used to calculate the toll. Previously, the GAW (permissible total weight, Certificate of Registration Part 1, field "F.2") formed the basis for calculation. There is also a transitional arrangement: vehicles whose TPM exceeds 3.5 t, but which were registered before 1 December 2023 and had a GAW of no more than 3.5 t up to that date, must continue to purchase toll stickers and route tolls for vehicles up to 3.5 t TPM until 31 January 2029. If the GAW of no more than 3.5 t is revoked before this date, for example due to the cancellation of a down-rating, the vehicle will be subject to the distance-based toll with a GO-Box from that point onwards.
The Europamaut team wishes you a pleasant journey!
In summary, the GAW is the legally defined upper limit for the permissible total weight of a vehicle in road traffic, while the TPM represents the technically permissible mass that the vehicle may carry and move according to the manufacturer's specifications. To ensure road safety and the reliability of the vehicle, it is necessary to observe both limits.
We wish you a good trip to Austria and are happy to assist you with any questions regarding toll regulations. You can find detailed information on tolls in Austria in our guide. Feel free to use our route planner to plan your trip perfectly and see the suitable toll products displayed. If you have any further questions about your trip or our digital toll sticker, please feel free to contact us via email.
FAQ on the toll weight class tzGm vs. zGG
Answers to the most frequently asked questions on this topic.
What is the difference between tzGm and zGG?
The technically permissible maximum mass (tpmlm) is the technically permissible maximum mass determined by the manufacturer (field F.1 of the registration certificate part I). The permissible maximum mass (pmm) is the permissible maximum mass according to the registration (field F.2), which may be lower, for example after a weight reduction.
Since when has the switch to tzGm been in effect?
Since 1 December 2023, the tzGm has been used for toll calculation in Austria; previously, the zGG was decisive.
Where can I find my vehicle's technically permissible maximum mass (tzGm)?
The technically permissible maximum mass (tzGm) is noted in Part 1 of the vehicle registration certificate, field "F.1".
