U.S. Route 81 is a major north-south highway in the United States, stretching approximately 1,500 miles. It runs from Texas in the south to North Dakota in the north, passing through several states including Oklahoma, Kansas, and Nebraska. The route serves as an important corridor for transportation and commerce. Originally established in 1926, U.S. Route 81 was part of the early U.S. highway system. It connects various cities and towns, providing access to rural areas and facilitating travel across the central part of the country. The highway has undergone changes over the years, with some sections being replaced by interstate highways.