The covered wagon or prairie wagon, historically also referred to as an ambulance or prairie schooner, was a vehicle usually made out of wood and canvas that was used for transportation, prominently in 19th-century America. With roots in the heavy Conestoga wagon developed for the rough, undeveloped roads and paths of the colonial East, the covered wagon spread west with American migration. The Conestoga wagon was far too heavy for westward expansion. Typical farm wagons were merely covered for westward expansion and heavily relied upon along such travel routes as the Great Wagon Road, the Mormon Trail and the Santa Fe and Oregon Trails, covered wagons carried settlers seeking land, gold, and new futures ever further west.