Interstate 80, often abbreviated as I-80, is a major east-west highway in the United States. It stretches approximately 2,900 miles from San Francisco, California in the west to Teaneck, New Jersey in the east. I-80 is a vital transportation route, connecting several key cities, including Chicago, Illinois and Salt Lake City, Utah. Established in 1956 as part of the Eisenhower Interstate System, I-80 serves both commercial and personal travel needs. The highway passes through diverse landscapes, including mountains, plains, and urban areas, making it an important corridor for freight and tourism across the country.