The Pan American Highway connects North and South America and spans roughly 30,000 miles. Even though it is called a highway, it is more like a conglomeration of many roads of varying conditions.
Some are highways. Some not so much. There is a 60 mile stretch of jungle between Panama and Columbia that is considered not passable. Most people, including us, bypass that via ferry.
With all that said, most overlanders don’t actually travel “the PanAm.” We still have no idea which parts are the PanAm and which parts aren’t. It represents more THE IDEA of driving the North and South Americas than the actual road. For us, we drove from California to Tierra del Fuego of Chile over 25,000 miles. It took us 18 months to complete and we visited 11 countries. Everyone’s journey will be different. If you are on a similar journey, just point your nose north or south and go, and not worry so much about “the route.”