Quick Facts about driving in Portugal Tourists can drive on their U.S. license for up to 185 days from their date of arrival Right of way: Give priority to traffic coming from your right unless a sign says otherwise. Roundabouts: Vehicles already inside the roundabout have priority; stay in the outer lane only if exiting at the next turn. Seatbelts: Mandatory for all passengers in both front and back seats. Child safety: Children under 12 or shorter than 135 cm cannot sit in

Driving in Portugal is possible but some of the street signs are different . Know how to rent a car in Portugal