A note for those who take up the challenge to see Europe by rental car.
European road map makers are not at all fair to Spain. Most European road maps appear to suggest that getting to Madrid from the north or east
is little easier than traveling from Mumbai to Delhi by car. There is every indication that motoways stop at least 100 miles from the city. They do not.
The Spanish roads numbered by Roman numerals, I, II, III and IV are motorway standard and it would do well for the map makers to visit Spain to see for themselves.
These roads are somewhat older and fall short of English hard shoulder requirements, but so do U.S. interstates. No one should fear the long delays and heavy
traffic that would be associated with pre-motorway two lane roads.