Many EU states operate a 'vignette' system of taxing vehicles. The system is likely to be rolled out across the EU, with member states being able to tax foreign HGVs using their roads, if they wish.
The European Parliament's Transport Committee has called for 15% of all revenue raised in this way to be handed over to the EU to help fund their own transport projects.
This is just one of a number of 'EU taxes' that are being discussed at the moment. I shall, of course, vote against every single one of these proposals.