Most of the rest is more or less level. The roads are not good. Brazil has either too many cars or not enough roads. The main routes are four-lane freeways. If you bike on the pavement, trucks will come uncomfortably close.
Some shoulders are well paved, some rough, some dirt.
The secondary roads are often poorly paved and may have heavy traffic with no shoulder. On this route, about one-third of the distance is pleasant cycling on decent pavement with moderate to light traffic. Drivers are generally good and many gave us the thumbs up. Most Brazilians were impressed that we were travelling by bike. If you go to south Brazil, Iguacu Falls are a must-see.