USA HISTORY

Detailed explanation-1: -The Incas built causeways to elevate the roads in swampy areas. They also built amazing bridges, which they called chacas. The hanging bridges are the most famous of the Incan chacas. One Incan bridge was over 250 feet long.

Detailed explanation-2: -The Qhapaq Ñan, or Road of the Inka, made this triumph possible. A vast complex of roads, bridges, and other structures, the Qhapaq Ñan was the largest construction in the Western Hemisphere when Inka power was at its height.

Detailed explanation-3: -The Inca road system formed a network known as the royal highway or qhapaq ñan, which became an invaluable part of the Inca empire. Roads facilitated the movement of armies, people, and goods across plains, deserts and mountains.

Detailed explanation-4: -The road facilitated message relays, allowing communication between a vast empire that lacked a writing system and practical use of the wheel. Stones from a sacred quarry near Cusco infused the pathway with the divine, and legitimized the rule of the Inca emperors.