Tolls, vignettes and low-emission zones
A toll is a charge for using a particular road. A vignette is a licence to use a whole national network. A low-emission zone is a rule about which vehicles may enter an area at all.
Paying one does nothing for the others, and the three fail in completely different ways. That last point is the useful one, and it comes at the end.
Tolls: barrier and free-flow
Barrier tolls are the familiar kind. France, Italy, Spain and parts of Portugal run motorway networks where you take a ticket, drive, and pay at a booth by card or cash. Nothing to arrange in advance, nothing much to go wrong.
Two small things. Carry a card that works in unattended machines, and know where the intercom button is. And in France, the leftmost lanes marked with an orange “t” are télépéage — subscriber transponders only — and entering one without a badge means reversing out of a queue.
Free-flow tolls are the ones that catch foreign drivers. A gantry reads your number plate at speed. There is no booth, so nothing tells you that you have incurred a charge and nothing tells you when it is due.
Portugal’s electronic-only motorways work this way, as does Dublin’s M50. The failure is always identical: you did not know you owed anything, the payment window closed, and a penalty ladder engaged.
If your route touches a free-flow network, work out the payment method before you drive it. There is no retrospective moment of realisation built into the system.
Vignettes: bought before you arrive
A vignette is prepaid access to a national motorway network, sold by time rather than distance. Austria, Switzerland, Czechia, Slovakia, Slovenia, Hungary, Romania and Bulgaria all use one, in sticker or electronic form depending on the country.
Most sell short durations — ten days, a month, two months — alongside an annual. Buying at a large petrol station near the frontier is entirely normal and works.
Switzerland is the one that behaves differently. There is no short option. The vignette is annual only, priced at CHF 40 for 2026, and tied to a calendar period rather than to your trip: the 2026 vignette runs from 1 December 2025 to 31 January 2027. Cross Switzerland for ninety minutes on the way to Italy and you buy the whole year. Driving a Swiss motorway without one attracts a CHF 200 fine on top of the cost of the vignette itself.
Austria, by comparison, sold its digital vignette for 2026 at €9.60 for one day, €12.80 for ten days, €32.00 for two months and €106.80 for the year. Austria also levies separate tolls on certain alpine tunnels and passes that the vignette does not cover — the Brenner, the Tauern and others are billed on their own.
One quirk of the Austrian digital vignette as of 2026: bought directly by a private consumer, the two-month and annual versions only become valid on the eighteenth day, an artefact of consumer cancellation rights. The one-day and ten-day versions are valid immediately. If you need long-duration cover starting tomorrow, buy the physical sticker instead.
Buy from the official national channel
Search for any vignette and the results fill with resellers. Some are legitimate agents. Many charge a substantial markup over the state price for filling in a form you could fill in yourself, and several are designed to look like the government site.
Each country sells its own through a single official channel — ASFINAG’s own shop for Austria, the federal Via portal for Switzerland, and national equivalents elsewhere. Go there directly, or buy a physical vignette at a petrol station near the border, where it is sold at face value.
The tell is the price. If a site is charging noticeably more than the figure printed on the national authority’s own page, you are paying a broker for nothing.
Low-emission zones and access restrictions
These are not charges for using a road. They are rules about which vehicles may enter an area, enforced by camera against your plate.
France: Crit’Air
A small round sticker classifying the vehicle by emissions standard. It costs a few euros — around €4–5 including postage as of mid-2026 — and is permanent for the life of the vehicle.
French ZFE low-emission zones require it, and driving in one without a valid sticker attracts a fine of around €68. Order from the official French government site well before travelling, because it arrives by post.
Germany: Umweltplakette
The same idea, executed once. A green sticker, roughly €5–15, permanent, required for every German Umweltzone — which includes most large city centres.
Entering one without it is a flat €80 fine with no licence points. Available from testing stations, some garages, and online.
Italy: ZTL
The important one, because there is nothing to buy.
A ZTL — zona a traffico limitato — is a historic centre closed to non-residents during posted hours. No visitor sticker exists. There is no day pass at the boundary and no way to make yourself compliant. Cameras at each entry point read the plate.
Fines run roughly €80–300 per entry and arrive by post months later, frequently after you have forgotten the trip entirely. A single wrong turn in a city like Florence or Bologna can trigger several separate entries and several separate fines.
Navigation apps are unreliable here. Some route straight through, most do not flag the boundary clearly, and the sign itself is a small white circle with a red border that reads as generic. Park outside the historic centre and walk in. Every Italian city of any size has signposted car parks at the edge for exactly this purpose.
If your hotel sits inside a ZTL it can usually register your plate for temporary access. Email the registration to them before arrival and get written confirmation. Do not assume they will do it; ask.
London: congestion charge and ULEZ
The UK case stacks two separate charges on the same journey.
The central London congestion charge rose to £18 per day on 2 January 2026, payable in advance or on the day of travel, with a higher rate if you pay up to three days afterwards. Separately, the Ultra Low Emission Zone charge of £12.50 per day applies across the whole of Greater London to vehicles that do not meet the emissions standard — most modern EU petrol and diesel cars do meet it.
Check your specific hire car on Transport for London’s vehicle checker before you drive in. The ULEZ boundary is far larger than the congestion zone and covers the approach roads from every London airport.
The three failure modes
This is the part worth carrying with you.
A toll you can usually pay late. Free-flow systems have a payment window and an escalation ladder, and paying inside the window costs face value.
A vignette you can buy at the border. Leaving one until the last minute is an inconvenience rather than a disaster, because the final services before the frontier sell them.
A ZTL you cannot fix at all. Once the camera has your plate there is no payment that makes the entry legal, no retrospective permit, and nobody to appeal to who will care that you were lost.
So tolls and vignettes are budget items. Zones are route-planning items, and they need deciding before you set off, not at the junction.
The exception: hire cars in Italy and Portugal
Check at pickup, because the vehicle may already be enrolled in a scheme.
Portuguese hire cars very frequently carry a Via Verde transponder, and many Italian ones carry a Telepass. Where they do, tolls are read automatically and billed to you afterwards by the rental company, typically with a daily service fee capped per rental.
If the car has an active device and you also stop and pay cash at a booth, you have paid twice — the gantry or the lane still reads the transponder. If it has no device and you assume it does, you have unpaid free-flow tolls quietly maturing into penalties.
So ask two questions at the desk and write the answers down. Is there a toll device in this car, and is it active? And how will tolls be charged to me — per day, per use, or with an administration fee per toll?
In Italy, ask a third. How does the operator handle a ZTL notice, and what does it charge to process one. The answer will not save you the fine, but it tells you what the total looks like when the envelope finally arrives.