American transportation history began with the establishment of Native American trails and later evolved with the arrival of European settlers. The construction of the National Road in the early 1800s marked a significant development, facilitating westward expansion and trade. The invention of the steam locomotive and the expansion of the railroad network in the mid-19th century revolutionized travel and commerce. The introduction of the automobile in the early 20th century further transformed transportation, leading to the development of highways and suburban areas, shaping modern American society.