Interstate 11 (I-11) is a proposed highway in the United States that aims to connect Las Vegas, Nevada to Phoenix, Arizona. This route is intended to improve transportation and economic development between these two major cities in the southwestern region. The highway is part of a larger plan to enhance the National Highway System and facilitate trade and travel. Once completed, I-11 will provide a more direct route for travelers and freight, reducing congestion on existing highways and promoting regional growth.