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List of Interstate Highways in Utah

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Interstate 15 marker
Interstate 215 marker
Highway markers for Interstate Highways
Map
Interstate Highways highlighted in red
Highway names
InterstatesInterstate nn (I-nn)
System links
  • Utah State Highway System

The Interstate Highways in Utah are maintained by the Utah Department of Transportation (UDOT). The Interstate Highway System is a nationwide system with only a small portion of these routes entering Utah. Originally, the State Road Commission of Utah, created on March 23, 1909 was responsible for maintenance, but these duties were rolled into the new UDOT in 1975.[1] There are 977.664 miles (1,573.398 km) of Interstates within the state. The longest is Interstate 15 (I-15) at 400.592 miles (644.690 km) and the shortest is I-215 at 28.946 miles (46.584 km). One unique former route is Interstate 415, which was never signed as such, and was only used as a temporary designation for the eastern portion of what is now the Interstate 215 belt loop around Salt Lake City.[2]

List

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-15 400.592 644.690 I-15 at the Arizona state line towards Littlefield I-15 at the Idaho state line towards Malad City 01956-01-011956 current I-15 crosses through the entire state, starting in the south from Saint George, up through the middle of the state where it intersects I-70, and into the Salt Lake Valley to meet with I-215 and I-80. After leaving the valley, I-15 continues north, where it becomes concurrent with I-84 until the split in Tremonton, where I-15 heads north into Idaho.[3][4]
I-70 231.673 372.842 I-15 near Cove Fort I-70/US 6/US 50 at the Colorado state line towards Grand Junction 01957-01-011957 current Interstate 70 begins in Utah near Cove Fort, not passing through any major metropolitan areas of Utah, and serves as a long-haul route to Denver and the east coast. A stretch of 110 miles (180 km) exists on the highway without any services available.[5][6]
I-80 196.680 316.526 I-80 at the Nevada state line in Wendover I-80/US 189 at the Wyoming state line towards Evanston 01956-01-011956 current Interstate 80 enters from Wendover and crosses the Bonneville Salt Flats before entering the Salt Lake Valley, briefly becoming concurrent with I-15 before leaving the valley through Parley's Canyon, meeting the end of I-84 and enters Wyoming.[7][8]
I-80N — — I-80N at the Idaho state line towards Burley I-80 near Echo 01958-01-011958 01977-01-011977 Now I-84[9]
I-84 119.773 192.756 I-84 at the Idaho state line towards Burley I-80 near Echo 01977-01-011977 current I-84 enters in Snowville and soon becomes concurrent with I-15 until it splits off in Roy, and enters Weber Canyon before ending at I-80 in Echo[10][11]
I-215 28.946 46.584 I-80 at Parley's Canyon I-15 in North Salt Lake 01963-01-011963 current 270 degree belt route around Salt Lake City[12][13]
I-415 — — I-15/I-215 in Murray I-80 in Salt Lake City 01959-01-011959 01969-01-011969 Now I-215[2]
  •       Former
  • I-15 in Salt Lake City
    I-15 in Salt Lake City
  • I-70 through Spotted Wolf Canyon
    I-70 through Spotted Wolf Canyon
  • I-80 approaching road construction in Salt Lake City
    I-80 approaching road construction in Salt Lake City

See also

References

  1. ^ "Utah State Archives Catalog". Utah State Archives. Retrieved July 29, 2008.
  2. ^ a b "SR-215 History" (PDF). State Road Commission of Utah. October 14, 1968. Retrieved July 29, 2008.
  3. ^ "Highway Reference - 0015 P". Utah Department of Transportation. May 1, 2008. Archived from the original (PDF) on October 18, 2007. Retrieved July 26, 2008.
  4. ^ "Utah Code §72-4-107". Utah State Legislature. Archived from the original on July 11, 2008. Retrieved July 29, 2008.
  5. ^ "Highway Reference - 0070 P". Utah Department of Transportation. May 1, 2008. Archived from the original (PDF) on September 22, 2008. Retrieved July 26, 2008.
  6. ^ "Utah Code §72-4-112". Utah State Legislature. Archived from the original on July 11, 2008. Retrieved July 29, 2008.
  7. ^ "Highway Reference - 0080 P". Utah Department of Transportation. May 1, 2008. Archived from the original (PDF) on September 22, 2008. Retrieved July 26, 2008.
  8. ^ "Utah Code §72-4-113". Utah State Legislature. Archived from the original on July 11, 2008. Retrieved July 29, 2008.
  9. ^ "Eisenhower Interstate Highway System, Previous Facts of the Day". Highway History. Federal Highway Administration, US DOT. March 15, 2010. Retrieved 11 October 2017.
  10. ^ "Highway Reference - 0084 P". Utah Department of Transportation. May 1, 2008. Archived from the original (PDF) on September 22, 2008. Retrieved July 26, 2008.
  11. ^ "Utah Code §72-4-114". Utah State Legislature. Retrieved July 29, 2008.
  12. ^ "Highway Reference - 0215 P" (PDF). Utah Department of Transportation. May 1, 2008. Retrieved July 26, 2008.
  13. ^ "Utah Code §72-4-127". Utah State Legislature. Archived from the original on July 11, 2008. Retrieved July 29, 2008.
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