Transporting crops and goods from town to town was extremely important for human progress. In the past, roads were built and transport was carried out by people and horses. However, rivers started being used by ships with more transporting power than horses to transport goods. Through the linking of towns by the river, each town developed. In more modern times, humans desired a newer transportation method, which is why they built railways for trains, and roads for cars to be driven on, connecting towns.