Kansas is a wide and flat state with hills and forests on the eastern edge, and the second largest highway system in the country. Agriculture is a major industry, and most Kansas freight shipping moves by truck and by rail. There are some rural areas in the state, but there are also several major hubs for transportation. Because the state is located in the center of the United States, most Kansas freight shipping rates are quite affordable. The state produces grain crops and meats, but low freight shipping prices can be found year round. Air shipping is best accomplished by first moving goods out of the state.