Generally, Michigan's main highways followed trails used by Native Americans for centuries to travel between their villages and hunting and fishing grounds. The trails were narrow paths, about wide, located on high, dry ground along streams and watersheds. Native Americans used dog sleds to move their cargo, a tradition that was followed in Michigan's territorial days, when dogs pulled sleds with mail and cargo on the trails. The trails were used by
fur traders, explorers, and missionaries to travel into the frontier. The roads were improved and widened for pack horses and settlers. Initially, branches and bushes were cleared, making the trails two to three feet wide to allow room for pack horses. Then, the trails were further widened for oxen-drawn wagons. Federal funds were appropriated to improve the roads, which involved cutting down trees and filling in swampy and low areas. Traveling by wagon was slow, particularly after the roads developed ruts. Later improvements were gravel and then paved roads. ==History==