Interstate 17 also known as the Black Canyon Freeway, is an intrastate Interstate Highway located entirely within the state of Arizona

Arizona

Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

, United States. I-17's southern terminus lies within Phoenix

Phoenix, Arizona

Phoenix is the capital, and largest city, of the U.S. state of Arizona, as well as the sixth most populated city in the United States. Phoenix is home to 1,445,632 people according to the official 2010 U.S. Census Bureau data...

, at Interstate 10

Interstate 10 in Arizona

In the U.S. state of Arizona, Interstate 10, the major east–west Interstate Highway in the southern United States, runs east from California, enters Arizona and continues through Phoenix and Tucson and exits at the border with New Mexico.-Route description:...

, and its northern terminus is in Flagstaff

Flagstaff, Arizona

Flagstaff is a city located in northern Arizona, in the southwestern United States. In 2010, the city's population was 65,870. The population of the Metropolitan Statistical Area was at 134,421 in 2010. It is the county seat of Coconino County...

, at Interstate 40

Interstate 40 in Arizona

Interstate 40 is an east–west Interstate Highway that has a section in the U.S. state of Arizona connecting sections in California to New Mexico. It enters Arizona from the west at a crossing of the Colorado River southwest of Kingman...

. The southern part of the freeway was built along the alignment of SR 69, while the northern part was built along SR 79's alignment.