Hello, can someone please tell me about the operation of the truck toll bridges? Is every vehicle recorded at these stations and how does the system know if the vehicle is tolled? For me it looks as if the vehicles are photographed. One often hears of tollprellers, how is that possible? Will I not necessarily be caught as tollpreller at the station when I have not paid tolls? And another question to the end, how does the OBU work? Do I need no toll here? book more so the system chooses itself when driving the AB? Thank you for your comments.