Interstate 15
Wikipedia: Interstate 15 (I-15) is a major Interstate Highway in the western United States. I-15 begins near the Mexico–US border in San Diego County and stretches north to Alberta, Canada, passing through the states of California, Nevada, Arizona, Utah, Idaho, and Montana. The interstate serves the cities of San Diego, Las Vegas, St. George, Salt Lake City, Pocatello, Idaho Falls, and Butte. It also passes close to the urban areas of Orange County, California; Los Angeles County, California; Provo, Utah; Ogden, Utah; and Helena, Montana.
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Interstate 15
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