You can travel on Hungarian motorways and dual carriageways by motorbike, car, motorhome, with a trailer, or with trucks and buses under 3.5 tonnes only with a valid motorway e-vignette. E-vignettes can be purchased at petrol stations or via this link on the official website of Hungarian Public Roads – Toll Division.
When to buy it?
Just as you have to buy a ticket in advance for public transport, you also have to buy the e-vignette before driving onto the motorway. If you happen to forget to buy an evignette, you still have 60 minutes to stop and buy it at a petrol station or online (of course not while driving). You need an e-vignettenot only on motorways but also on dual carriageways.