Rules for overlanding in United States

Our summary of the country advice published by the Italian Ministry of Foreign Affairs (Viaggiare Sicuri) on 26 May 2026.

Which licence you need

All vehicles — An Italian licence is considered valid for driving in the United States for a stay of up to 12 months, and the ministry advises carrying an International Driving Permit (1949 Geneva model) with it, because officials recognise it easily after an accident or a traffic violation. Both the national licence and the permit must be carried at all times. Recognition of foreign driving documents is left to each state's own law and is not uniform across the country, so check what applies to the licence you hold.

An International Driving Permit states the categories it covers: check yours covers what you will actually drive. A car licence does not cover a motorcycle, and a heavy camper or a truck can need a higher category.

At the wheel

Driving someone else's vehicle — You need a letter of authority from the owner, with the signature notarised.
Insurance — Policies issued in Canada are recognised; other foreign policies are not, so you have to take out cover when you enter. A visiting motorist buys temporary cover from American International Underwriters (AIU Personal Lines Division).
Police stops — Drivers are frequently arrested for ignoring speed limits and the road code. If you are pulled over, follow the officer's instructions to the letter: do not get out of the vehicle, keep your hands on the wheel, and hand over the documents you are asked for.
Alcohol and testing — Driving under the influence of alcohol or drugs is prohibited in every state and in the District of Columbia; the limit is 0.08% everywhere, 0.04% for commercial vehicles and generally 0.02% for under-21s. Most states also ban open bottles or cans of alcohol inside the vehicle, and in some, Connecticut for instance, a driver under 21 may not even carry a sealed one unless a parent or guardian is on board. In many states driving on public roads counts as implied consent to breath, blood and urine tests if you are stopped: refusing brings a criminal charge in some states, a 120-day licence suspension in Massachusetts and a one-year suspension in California.
Helmets and lights — Nineteen states require a helmet for all motorcyclists, 28 only for certain categories, and Illinois, Iowa and New Hampshire have no helmet law at all. In Alaska, Arkansas, California, Florida, Hawaii, Kansas, Montana, New York, North Carolina, Oklahoma, Oregon, South Carolina, Tennessee, Texas, Washington, West Virginia, Wisconsin and Wyoming motorcyclists must always ride with headlights on. Hazard lights may only be used at 25 mph (about 40 km/h) or less.
Belts, seats and kit — Front-seat occupants must wear seatbelts everywhere except New Hampshire, which has no rule for people over 18, while a long list of states require belts in the back as well. Child restraint rules vary state by state. A fire extinguisher and a first-aid kit on board are recommended.
Interstates, tolls and clearances — Interstate highways are multi-lane with controlled access and are normally toll-free, but some multi-lane stretches are tolled, usually near the big cities, with rates depending on vehicle type and distance and payment in cash or electronically. Many tunnels and bridges are tolled too, and some set height and weight limits, as do smaller or older roads and bridges, all clearly signed, so check ahead if your vehicle is tall or heavy. Rules on using motorcycles on toll roads and expressways are signed at the entrances.
Fuel — Petrol is sold by the US gallon, 3.78 litres, and is widely available except in very thinly populated areas and in the mountains; some stations open 24 hours. Leaded petrol is not sold. There are around 51,000 public charging points for electric vehicles.

What catches travellers out

ESTA and overstay — The Visa Waiver Program lets citizens of 42 countries, Italy included, enter for business or tourism for up to 90 days, with an ESTA authorisation obtained before boarding, and it gives no right to do paid work of any kind. Even a few days over the limit can bring action from the US authorities, up to prolonged detention, and can wreck your chances of entering again; the ministry notes particular strictness on the land border between Washington State and Canada and between Mexico and the states of California and Texas. Admission is always the border officer's decision, and administrative problems from earlier stays, such as speeding fines or a previous overstay, can get you refused and held at the airport until the first flight back.
Travel history voids ESTA — Anyone who has visited Cuba since 12 January 2021, or Iran, Iraq, Libya, Syria, Somalia, Sudan, Yemen or North Korea since 1 March 2011, cannot travel on an ESTA and needs a visa, transit through Cuba included. An already approved ESTA gets revoked in those cases. Narrow exceptions exist, decided case by case, for official, humanitarian, journalistic or legitimate business travel.
Cannabis — Federal law makes use, possession, sale, cultivation and transport of cannabis illegal, even though a long list of states have legalised medical or recreational use with age limits. Airports are federal territory, so possessing marijuana or having used it recently can be grounds for immigration officers to refuse you entry even where the state itself allows it.
Cash and medicines — Declare any sum above 2,500 euro to avoid disputes when you leave. Carry prescription medicines in their original packaging with the prescription or a medical certificate in English, and only the quantity you need for yourself during the stay.

Before you rely on this

This is our summary of advice written by the Italian Ministry of Foreign Affairs for Italian travellers, published on 26 May 2026. We summarise in good faith, but we cannot guarantee it is accurate, current or complete, and we take no responsibility for decisions made on the basis of it. Rules change without notice and are applied by officials at the border, not by websites. Always read the original source and the travel advice your own government publishes for United States before you travel. GuideMeet has no way of checking whether an individual guide meets any standard mentioned here — ask them directly.

Source: Viaggiare Sicuri — Italian Ministry of Foreign Affairs, updated 26 May 2026. Last checked by GuideMeet on 2026-09-20.