The Inca road system (called Capaq Ñan in Quechua and Gran Ruta Inca in Spanish) was an essential part of the success of the Inca Empire. The road system included an astounding kilometers miles) of roads, bridges, tunnels and causeways.
The Inca road system was the most extensive and advanced transportation system in pre-Columbian South America. It was about 39,900 kilometres (24,800 mi) long. The construction of the roads required a large expenditure of time and effort, and the quality of that construction is borne out by the fact that it is still in quite good condition after over 400 years of use. Qhapaq Ñan