Maximum speed: 60km/h in the city, 40km/h on side roads and 100km/h to 130km/h on roads outside the city as well as on highways. There are frequent speed controls. However speed limits and lane markings are universally ignored, and running red lights is common. Most drivers treat stop signs, octagonal red signs reading PARE, as though they were "yield" signs, though some drivers ignore them completely. Within cities surrounding Buenos Aires it is proper to honk at an impending intersection and the one who honks first has right of way. Right of way is determined somewhat haphazardly by a combination of vehicle size and who arrives first. Make sure you are thoroughly confident in your driving skills before attempting to drive in Argentina.
The current cost of gasoline in central and southern Argentina is approximately ARS16 per litre. In many small towns, particularly in the north, they may ration gasoline to ensure they have enough to sell until the next refuelling truck arrives, in which case you will only be allowed to buy 300 pesos worth of fuel at a time. It's advisable to fill your tank at regular intervals when the opportunity arises. In the Andes, the gasoline consumption of non-turbo charged engines increases due to the altitude.
Highways and Freeways
Travelling by car allows you to visit locations that are hard to reach by public transportation. Patagonia, in the South of Argentina, is a popular driving location among tourists due to the breathtaking views across many miles of open land.
Argentina generally recognizes valid drivers' licenses from foreign jurisdictions. Drivers must be over 21. The rental companies will charge the renters card ARS6000 to be used in the event of an accident. They cancel this charge when the car is returned. On the rutas, in the provinces bordering other countries, the police frequently stop cars at controles policiales ("police checkpoints") to check insurance and registration papers and drivers' licenses. They do not stop all cars, though; when you come to a control policial, drive slowly and you will usually be waved through without stopping. Near provincial borders, these controles may also involve inspection of the trunk for contraband and a mandatory two peso fee for "disinfection" or "de-insectifying" the car's underside by driving it over a mechanical sprayer that either sprays water or does nothing. The police have been known to set up roadblocks and demand bribes for passage, particularly around the city of Buenos Aires.
Traffic regulations in Argentina are generally the same as in the US or Europe, but the local often ignore the regulations. On roads and highways it´s mandatory to have car lights on, even during daytime. Be aware that the driving style in Argentina is aggressive and chaotic. Pay attention at night.
Highways are limited to the areas around large cities. Most of the country is connected by paved unlit two-lane roads (rutas) shared by buses, cars, and large trucks. Some places are accessible only by gravel or dirt roads - indeed, some main roads in southern Argentina are unsealed, leading to 4WD vehicles being more popular. This is particularly the case in the south. It is important to travel with a good map ( e.g. Argentina Waterproof Road Map from World Mapping Project) and to be well informed about your route distances, road conditions and the estimated travel time. In addition to a good map the website of cochera andina publishes useful information on more than 120 routes in Argentina.