Then there is the question of insurance. Whether you also need an International Drivers License is debatable. IDLs are valid for only one year. Gas stations are plentiful along the autovias, and many of them are adjacent to bountiful delis where you can buy sandwiches and snacks for your trip. Driving the autovias is easier than driving the typical U.S. interstate, even though speed limits may be higher.
Smaller roads can be scenic but frustrating, particularly winding two-lane roads in hill country.
City driving requires patience, planning and live-in psychiatric staff.