12 Mistakes Americans Make When Driving in Europe — And the One That Can Result in a Criminal Record

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Renting a car in Europe feels like freedom. Open roads through Tuscany, the Amalfi Coast, the Scottish Highlands. What nobody tells you before you pick up the keys is that European traffic laws differ enough from American ones that confident drivers get into serious trouble. Some of these mistakes cost you money. One of them can follow you home.

The Mistakes That Cost Money

1. Driving into a ZTL zone in Italy

ZTL (Zona a Traffico Limitato) zones exist in most Italian city centers and are enforced by cameras that photograph every license plate. Driving into a ZTL as a tourist doesn’t mean you get away with it — fines are sent to the rental car company, which charges them to your credit card months after you return home, often with a substantial administrative fee added. Some travelers have received $400–$800 in charges long after forgetting they drove through a historic center at all.

2. Not having a vignette in Switzerland, Austria, or the Czech Republic

Several European countries require a highway tax sticker (vignette) to use motorways. Swiss rental cars usually have them; other countries require you to purchase separately. Getting caught without one means an on-the-spot fine of 250 CHF in Switzerland — roughly $280.

3. Misreading priority-to-the-right rules

In France and several other countries, vehicles entering from the right have priority at uncontrolled intersections unless otherwise posted. Americans are accustomed to right-of-way being determined by the stop sign or who arrived first. The French “priorité à droite” rule catches American drivers off guard and causes accidents.

4. Speeding through German average-speed cameras

Some stretches of European roads use “average speed” cameras that photograph your plate at entry and exit points and calculate your average speed over the distance. You can’t slow down for a known camera and then speed up again — the whole distance is measured. Many Americans familiar only with US speed trap logic don’t understand this system.

5. Skipping the International Driving Permit

Many European countries legally require an International Driving Permit (IDP) in addition to your US license. Rental companies often don’t ask for it — but police do. In Italy, driving without an IDP can result in fines of €400 and up. The IDP costs $20 at AAA and takes ten minutes to get.

The Mistakes That Go Beyond Money

6. Driving drunk at local legal limits — which differ from US limits

The US federal threshold for DUI is 0.08% BAC. Several European countries set their limit at 0.05%. Some — Czech Republic, Hungary, Romania — enforce zero tolerance (0.00%). An American who has had two glasses of wine and is below the US legal limit may still be over the limit in the country they’re driving in. Czech Republic violations can result in imprisonment, not just fines. This is the one that can follow you home: a foreign criminal DUI conviction can affect future visa applications and travel to other countries.

7. Left lane cruising on the Autobahn

Germany takes its “keep right except to pass” rule seriously, and police enforce it. Driving slowly in the left lane on the Autobahn can result in a fine and is a genuine safety hazard given that vehicles legally traveling at 150+ mph are approaching from behind.

8. Using a phone while driving — including at a stop light

The UK, Germany, France, and most other European countries prohibit phone use while driving with no exception for being stopped at a light. In the UK, the penalty was increased significantly in 2023 to 6 points on a license and a £200 fine — even at a red light, engine running, you cannot touch your phone.

9. Roundabout priority errors

In Europe, vehicles inside a roundabout generally have priority over entering traffic. In some US states, it’s the opposite. Getting it backward causes accidents and can result in you being at fault.

10. Not having required safety equipment in the car

France requires a breathalyzer kit in every car. Spain requires two warning triangles. These items should be in your rental by law, but confirm with the rental company and document it at pickup — if something happens and the equipment is missing, you may share liability.

11. Misunderstanding UK road markings

Double yellow lines in the UK mean no waiting at any time — far more restrictive than American yellow curbs. Single yellow lines have time-based restrictions. Box junctions (yellow hatched boxes at intersections) prohibit entering unless your exit is clear.

12. Not declining the rental car’s collision damage waiver — and then not having backup coverage

Many travel credit cards cover rental car collision damage in the US but exclude coverage in certain European countries or for certain vehicle classes. Confirm your credit card’s international rental coverage before declining the rental company’s CDW. The gap between thinking you’re covered and actually being covered for a European rental accident has cost travelers thousands.

European road trips are some of the best travel experiences available. The preparation required is real but minimal — get the IDP, research the specific rules of every country you’re driving through, set your drink threshold at 0.04% or lower to be safe everywhere, and stay out of city centers unless you’ve confirmed the route. Most mistakes are avoidable. The criminal-record one is entirely avoidable.