Inca road network (Qhapaq Ñan)

Timeline

1. c. 600–1200Central Andean region · Bolivian highlandsThe Wari and Tiwanaku cultures had already established regional road and relay station networks, serving as important precursors to the Inca road system; the Inca inherited and greatly expanded the alignments and infrastructure of these existing routes.
2. 1438–1493Throughout Tawantinsuyu · Andean regionDuring the large-scale conquests and expansion of Pachacuti and his son Tupac Inca Yupanqui, the empire systematically integrated and built new roads, forming a dual trunk system: the Andean crest road (Inti Ñan) and the Pacific coastal highway, linked by lateral connectors, with relay stations (tambo) every 15–30 km along the way and a relay messenger system (chasqui) established.
3. 1511–1520Throughout Tawantinsuyu · Andean regionIn the final years of Huayna Capac's reign, Qhapaq Ñan had completed its final extension toward Quito (Ecuador), totaling over 30,000 km, serving as the core infrastructure for Inca troop movements, mit'a corvée conscription, and tribute transport; the messenger system could carry news from Quito to Cusco within two days.
4. 1533Western South America · Andean regionDuring the colonial period the centralized management system collapsed, the relay station system was abandoned, and some roads gradually fell into disrepair; however, many stretches continued to be used in the rugged mountain terrain, and a considerable proportion of modern highways were built along Inca routes. In 2014 Qhapaq Ñan was inscribed on the UNESCO World Heritage List as the "Andean Road System."