Pennsylvania Route 80, commonly known as I-80, is a major east-west interstate highway in the United States. It stretches approximately 311 miles across Pennsylvania, connecting the Ohio border in the west to the New Jersey border in the east. This highway serves as a vital transportation route for both commercial and personal travel. The route passes through various landscapes, including mountains, forests, and urban areas. Key cities along I-80 include Erie, Williamsport, and Scranton. It also intersects with several other major highways, enhancing its importance in the regional transportation network.