The traffic regulations are no different from those adopted in Western Europe, only if the points you should always bring a spare pair. Andorra are very disciplined and law-abiding drivers, but, nevertheless, often do not observe speed limits and rules for overtaking.
Taxis operate only within the city limits or to the lift station. Taxi is best to call on the phone, but the waiting period is usually more than 1 hour. Average cost of hiring a taxi - $ 5 (per car), ski lifts - $ 20 (per car). Tipping is not required, but welcome.
Rent a car you must have a credit card and international driving license. The rent usually includes the cost of gasoline, but includes insurance (the insurance policy must always be with me).