There are sleeper services from Buenos Aires to Mendoza, Cordoba and Bariloche. It may be possible to obtain a discount with a Student Card, YHA card or credentials which prove you are a teacher. Motorists will need an International Driving Permit as well as their national driving license. Most main roads are paved, but road surface will vary greatly outside the main towns. On dirt and gravel roads a screen is recommended for the windshield.
Most main roads operate with a toll system.
Reasonable road maps may be bought from the Autom vil Club Argentino, as well as information on road conditions, hotels and camping facilities. Argentina is generally considered a healthy country to visit with reasonable sanitary services. If visiting tropical lowland areas, seek advice about malaria precautions and drink bottled water. Cholera is still a problem in the subtropical north around Salta, Jujuy and Chaco. It is best to seek advice from your embassy in Buenos Aires before heading to these areas.