How good is the quality of the roads in South American countries?

How good is the quality of the roads in South American countries?
The Netherlands has one of the largest and densest cycling infrastructure networks in the world. Where are all the Dutch bicycle paths located?
How good is the quality of the roads in North American countries?
Which cities in Europe have the worst traffic?
How good are train services around Europe? Well, it has some of the best and worst train services in world.
We looked at the roads in Europe, but how good is the quality of the roads in Asian countries?
Four of the world’s top 5 railway networks are in Asia.
How good is the quality of the roads in European countries?
Which European systems have a metro/ subway system and when was the first line opened?
Trolleybuses are often associated with the Soviet Union, communism and Cold War era Eastern Europe. But how much of that is still true today?
Japan is renowned for its punctual and convenient public transport system. But how much of the country does it actually cover?