Interstate 15 | ||||
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Veterans Memorial Highway | ||||
Route information | ||||
Defined by Utah Code §72-4-107 | ||||
Maintained by UDOT | ||||
Length: | 400.592 mi (644.690 km) | |||
Major junctions | ||||
South end: | I-15 towards Littlefield, Arizona | |||
I-70 near Cove Fort US-50 near Holden and Scipio US-6 in Santaquin and Spanish Fork US-89 in Lehi, Draper, Bountiful, and Farmington I-215 in Murray and North Salt Lake I-80 in South Salt Lake and Salt Lake City I-84 in Riverdale and Tremonton US-91 in Brigham City |
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North end: | I-15 towards Malad City, Idaho | |||
Highway system | ||||
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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. The entire length of I-15 within Utah (and south into Arizona) is designated as the Veterans Memorial Highway.
The interstate passes through the fast-growing Dixie region, which includes St. George, Cedar City, and eventually most of the major cities and suburbs along the Wasatch Front, including Provo, Orem, Sandy, West Jordan, Salt Lake City, Layton, and Ogden. Around Cove Fort, Interstate 70 begins its journey eastward across the country. The interstate merges with I-80 for about 3 miles (4.8 km) from South Salt Lake to just west of Downtown Salt Lake City and merges with Interstate 84 from Ogden to Tremonton. Along nearly its entire length through the state, I-15 winds its way along the western edge of a nearly continuous range of mountains (including the Wasatch Range in the northern half of the state). The only exceptions are when it passes through the mountains south of Cedar City and again north of Cove Fort.