Emission Category For Tolls In Austria (1 Viewer)

[Jandek]

We are in the planning stage for a trip to Croatia. Route will take us through Austria for a couple of hundred miles. As we are over 3.5t will need to get a go box for the toll. The bit I can't understand is the emission categories. Anyone understand how they are calculated?
Have just passed MOT and have print out of emissions but the figures don't match up to what is on the Austrian web site. Asked at the garage and they didn't understand either.
Figures we have are
Absorption coefficient 0.64l/m Absorption coefficient after correction 0.63l/m. Test applied fast pass . Test result pass. Anyone know what that all means ??

 

[Pilote87]

Be aware that the "Go-Box" clocks off the pre-loaded credit by the kilometer. It is VERY expensive. I have taken a twin-axled motorhome into Austria for skiing trips and not used their motorway network. It is fairly easy, BUT you will have to pass through towns and villages.

J