List of Interstate and U.S. Highways in Utah

This list covers Interstate and U.S. highways in Utah. For state routes, see List of state highways in Utah.

I-15 shieldI-15 shield US-89 shield US-89 shield

Highway markers for Interstates and U.S. Highways in Utah
Highway names
Interstates: Interstate nn (I-nn)
US Highways: US Highway nn (US-nn)
System links
  • State highways in Utah

Three numbered highway systems are present in the U.S. state of Utah: the Interstate Highway System, the United States Numbered Highways system (more commonly known as "U.S. Routes") and the state route system. Both the Interstate and U.S. Highway system are nationwide systems with only a small portion of these routes entering Utah. The Utah Department of Transportation is responsible for maintaining all of the Interstate, U.S. Routes and state highways in the state. Originally, the State Road Commission of Utah, created on March 23, 1909 was responsible for maintenance, but these duties were rolled into the new Department of Transportation in 1975.[1]

There are 3,039.643 miles (4,891.831 km).[2] of Interstates and U.S. Routes in Utah, comprising 977.664 miles (1,573.398 km)[3] of Interstate highways and 2,061.979 miles (3,318.434 km)[4] of U.S. Routes. The longest Interstate is Interstate 15 at 400.592 miles (644.690 km) and the shortest being Interstate 215 at 28.946 miles (46.584 km). The longest U.S. Route is U.S. Route 89 at 502.577 miles (808.819 km) and the shortest being U.S. Route 89A at 2.94 miles (4.73 km).

Five former U.S. Routes exist in the state of Utah, as well as two former interstate highways, all of which have been replaced by current interstate and U.S. Routes, with the most recent change being U.S. Route 666 changing to U.S. Route 491 in 2003.[5] One unique former route would be 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.[6]

Interstate highways

Route number Length Western / southern terminus Eastern / northern terminus Counties Description Map Ref.
I-15 400.592 miles (644.690 km) I-15 at the Arizona state line towards Littlefield I-15 at the Idaho state line towards Malad City Washington, Iron, Beaver, Millard, Juab, Utah, Salt Lake, Davis, Weber, Box Elder Interstate 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. [7][8]
I-70 231.673 miles (372.842 km) I-15 near Cove Fort, UT I-70 / US 6 / US 50 at the Colorado state line towards Grand Junction Millard, Sevier, Emery, Grand 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. [9][10]
I-80 196.680 miles (316.526 km) I‑80 at the Nevada state line in Wendover I-80 / US 189 at the Wyoming state line towards Evanston Tooele, Salt Lake, Summit 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. [11][12]
I-84 119.773 miles (192.756 km) I-84 at the Idaho state line towards Burley I-80 near Echo Box Elder. Weber, Davis, Morgan, Summit 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 [13][14] [notes 1]
I-215 28.946 miles (46.584 km) I-80 at Parley's Canyon I-15 in North Salt Lake Salt Lake, Davis 270 degree belt route around Salt Lake City [15][16]

Former routes

Route number Western / southern terminus Eastern / northern terminus Years active Replaced by
I-80N I-80N at the Idaho state line towards Burley I-80 near Echo 1958–1977 I-84
I-415 I-15 / I-215 in Murray I-80 in Salt Lake City 1959–1969 I-215[6]

U.S. Highways

Route number Length Western / southern terminus Eastern / northern terminus Counties Description Map Ref.
US-6 373.963 miles (601.835 km) US 6 / US 50 at the Nevada state line towards Ely I-70 / US 6 / US 50 at the Colorado state line towards Grand Junction Millard, Juab, Utah, Wasatch, Carbon, Emery US-6 enters Utah through Delta, joined with US-50 until just after Delta and crosses across the middle of the state before joining I-70 and US-50 again to enter into Colorado, east of Cisco. [17][18]
US-40 174.624 miles (281.030 km) I-80 at Silver Creek Junction near Park City US 40 at the Colorado state line towards Dinosaur Summit, Wasatch, Duchesne, Uintah US-40 starts at I-80 outside of Park City and heads through Heber City and Duchense before passing into Colorado near the Dinosaur National Monument. [19][20]
US-50 334.920 miles (539.001 km) US 6 / US 50 at the Nevada state line towards Ely I-70 / US 6 / US 50 at the Colorado state line towards Grand Junction Millard, Sevier US-50 enters Utah joined with US-6 until just outside Delta, crossing the midsection of Utah, before joining with I-70 for its final 174 miles (280 km) to Colorado. [21][22] [notes 1]
US-89 502.577 miles (808.819 km) US 89 at the Arizona state line towards Page US-89 at the Idaho state line at Bear Lake Kane, Garfield, Piute, Sevier, Sanpete, Utah, Salt Lake, Davis, Weber, Box Elder, Cache, Rich US-89 is the longest U.S. Highway in Utah, going from the Arizona border to Idaho, paralleling I-15 for a good majority of the route, but it does split off at the north and south end of the route. [14][23]
US-89A 2.94 miles (4.73 km) US 89A at the Arizona state line towards Fredonia US-89 in Kanab Kane The original routing of US-89 prior to the construction of the Glen Canyon Dam. After construction was demoted to an auxiliary route listed as State Route 11 until 2008, and provides access to Grand Canyon National Park from Utah. [14][24]
US-91 45.271 miles (72.857 km) I-15 south of Brigham City US-91 at the Idaho state line towards Preston Box Elder, Cache The highway currently serves as a connection between the Cache Valley area of Utah and Idaho to the Salt Lake and Pocatello population centers. [25][26]
US-163 41.405 miles (66.635 km) US 163 at the Arizona state line in Monument Valley US-191 at Bluff San Juan US-163 enters Utah in Monument Valley in the southeastern part of the state, across the San Juan River towards Bluff. [27][28]
US-189 29.216 miles (47.019 km) I-15 south of Provo I-80 / US 189 at the Wyoming state line towards Evanston Utah, Wasatch From I-15 in Provo northeast through Provo Canyon to Heber City. From this point it overlaps US-40 until it intersects I-80, at which point it overlaps I-80 until the Wyoming border near Evanston. [29][30]
US-191 404.168 miles (650.445 km) US 191 at the Arizona state line towards Ganado US 191 at the Wyoming state line towards Rock Springs San Juan, Grand, Duchesne, Daggett, US-191 enters Utah in the southeastern part of the state and travels northward through Moab, veers to the northwest to Price, and back to the northeast through Vernal, before exiting into Wyoming near Flaming Gorge Reservoir. [31][32] [notes 1]
US-491 17.020 miles (27.391 km) US-191 in Monticello US 491 at the Colorado state line towards Dove Creek San Juan From US-191 in Monticello eastward until it exits the state into Colorado. [33][34]

Former routes

Route number Western / southern terminus Eastern / northern terminus Years active Replaced by
US-30S Idaho state line near Snowville Wyoming state line towards Evanston 1926 - 1970s I-80 / I-84 / US-189
US-160 US-6 / US-50 at Crescent Junction Colorado state line near Monticello 1930s - 1970 US-163 / US-666 (modern US-191 and US-491)
US-450 US-6 / US-50 at Crescent Junction Colorado state line near Monticello 1926 - 1930s US-160 (modern US-191 and US-491)
US-530 US-40 near Park City US-30S near Echo 1926 - 1930s US-189 (modern by I-80)
US-666 US-191 in Monticello US 666 at the Colorado state line towards Dove Creek 1970–2003 US-491[5]

Notes

  1. 1 2 3 Counties listed only reflect counties entered while the road is not concurrent with any other route

References

  1. ↑ "Utah State Archives Catalog". Retrieved 2008-07-29.
  2. ↑ This is the sum of all of the mileages listed in the "Length" section of all of the tables.
  3. ↑ This is the sum of the mileages from the Interstate and Auxiliary Interstate tables "Length" section
  4. ↑ This is the sum of the mileages from the U.S. Route table "Length" section.
  5. 1 2 Linthicum, Leslie (2003-07-31). "It's Now U.S. 491, Not U.S. 666". Albuquerque Journal. Retrieved 2008-07-29.
  6. 1 2 "SR-215 History" (PDF). State Road Commission of Utah. 1968-10-14. Retrieved 2008-07-29.
  7. ↑ "Highway Reference - 0015 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  8. ↑ "Utah Code §72-4-107". Utah State Legislature. Retrieved 2008-07-29.
  9. ↑ "Highway Reference - 0070 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  10. ↑ "Utah Code §72-4-112". Utah State Legislature. Retrieved 2008-07-29.
  11. ↑ "Highway Reference - 0080 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  12. ↑ "Utah Code §72-4-113". Utah State Legislature. Retrieved 2008-07-29.
  13. ↑ "Highway Reference - 0084 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  14. 1 2 3 "Utah Code §72-4-114". Utah State Legislature. Retrieved 2008-07-29.
  15. ↑ "Highway Reference - 0215 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  16. ↑ "Utah Code §72-4-127". Utah State Legislature. Retrieved 2008-07-29.
  17. ↑ "Highway Reference - 0006 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  18. ↑ "Utah Code §72-4-106". Utah State Legislature. Retrieved 2008-07-29.
  19. ↑ "Highway Reference - 0040 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  20. ↑ "Utah Code §72-4-109". Utah State Legislature. Retrieved 2008-07-29.
  21. ↑ "Highway Reference - 0050 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  22. ↑ "Utah Code §72-4-110". Utah State Legislature. Retrieved 2008-07-29.
  23. ↑ "Highway Reference - 0089 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  24. ↑ "Highway Reference - 089A P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  25. ↑ "Highway Reference - 0091 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  26. ↑ "Utah Code §72-4-115". Utah State Legislature. Retrieved 2008-07-29.
  27. ↑ "Highway Reference - 0163 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  28. ↑ "Utah Code §72-4-122". Utah State Legislature. Retrieved 2008-07-29.
  29. ↑ "Highway Reference - 0189 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  30. ↑ "Utah Code §72-4-124". Utah State Legislature. Retrieved 2008-07-29.
  31. ↑ "Highway Reference - 0191 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  32. ↑ "Utah Code §72-4-125". Utah State Legislature. Retrieved 2008-07-29.
  33. ↑ "Highway Reference - 0491 P" (PDF). Utah Department of Transportation. 2008-05-01. Retrieved 2008-07-26.
  34. ↑ "Utah Code §72-4-137". Utah State Legislature. Retrieved 2008-07-29.
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