Driving on Interstate 15 across entire State of Utah (timelapse) 

Interstate 15 (I-15) runs north-south in the U.S. state of Utah through the southwestern and central portions of the state, passing through many of the population centers of the state, including St. George, Provo, Salt Lake City, and Ogden, the latter three being part of the urban area known as the Wasatch Front. It is the primary north-south highway in Utah, as the majority of the state's population lives along its corridor. The only Metropolitan Statistical Area in Utah not connected by I-15 is the Logan Utah-Idaho Metropolitan Statistical Area. In 1998, the Utah Legislature designated the entire length within Utah as the Veterans Memorial Highway.