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U.S. Route 40 in Utah

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U.S. Route 40 marker

U.S. Route 40

Route information
Maintained by UDOT
Length174.624 mi[1] (281.030 km)
Existed1926–present
Major junctions
West end I-80 in Silver Summit
Major intersections US 189 in Heber City
US 191 in Duchesne
US 191 in Vernal
East end US 40 at the Colorado state line (west of Dinosaur, CO)
Location
CountryUnited States
StateUtah
Highway system
  • Utah State Highway System
← SR-39→ SR-42

The west end of U.S. Route 40 is in the U.S. state of Utah at Silver Creek Junction in Silver Summit(about 20.7 miles (33.3 km) east of Salt Lake City) with Interstate 80. From there it heads southeast through Heber City and east into Colorado on its way to the Mid-Atlantic.

Route description

U.S. Route 40 begins at I-80 at Silver Creek Junction in Silver Summit, traveling south-southeast as a full freeway in a broad valley northeast of Park City. At the south end of the valley, Jordanelle Reservoir comes into view and US-40 continues south high on the slope above its western shore while Utah State Route 248 climbs away to the east on the slope overlooking the northern shore. The freeway passes through several large cuttings in the side of the mountains that were dug when US-40 was relocated to make way for the reservoir; Utah State Route 319 provides access down the slope to a state park on the shore of the reservoir. South of the reservoir, the dam is visible on the left and the road loses elevation quickly before abruptly connecting to a (suburban or exurban) non-freeway segment with frequent curb cuts and building frontage. In central Heber, U.S. Highway 189 continues south, but US-40 turns east to leave the city. US-40 continues south and east through mountains and the Uintah Basin to the Colorado border near Dinosaur National Monument.

History

See also: Lincoln Highway in Utah and Wendover Cut-off

As with most states, US-40 follows the Victory Highway through Utah. This auto trail was organized in 1921, and overlapped the older Lincoln Highway through Salt Lake City. To the west, it split from the Lincoln at Mills Junction, and took a straight path across the Great Salt Lake Desert on the proposed Wendover Cut-off to Nevada. The east split with the Lincoln was at Kimball Junction, where the Victory turned to the southeast over an old trail that led past Heber City, over Daniel's Pass, and along the Strawberry River and Duchesne River to Fort Robidoux. The highway continued east across a relatively flat area through Vernal to Colorado.[2][3]

The Utah State Road Commission took over the highway from Kimball Junction to Colorado in 1910 and 1911; in late 1926, the American Association of State Highway Officials (AASHO) assigned US-40 to this cross-state route.[4]

The old Lincoln Highway east of Kimball Junction was initially US-530, but in the late 1930s it became part of US-189.[citation needed] The split between US-40 and US-189, formerly the junction of the Victory and Lincoln Highways, was moved east from Kimball Junction to Silver Creek Junction in 1952; this change moved both routes to a new road between Keetley Junction and Silver Creek Junction, and renumbered the road between Kimball and Silver Creek Junctions from US-189 to US-40.[5] The old road between Keetley and Kimball Junctions became State Route 248.[6] In 1974, with its replacement - Interstate 80 - almost complete across California, Nevada, and Utah, the three states applied to AASHO to truncate US-40 to Silver Creek Junction. (US-40 had been removed west of Truckee, California in 1964.) AASHO approved the truncation on June 17, 1975.[7]

After a bypass of Myton was built, the old route[citation needed] along Main and Sixth Streets became State Route 252 in 1953.[8] It was given to the city in 1969.[9]

Realignments

Major intersections

CountyLocationmi[1]kmExitDestinationsNotes
SummitSilver Creek Junction0.0000.000
 I-80 west – Salt Lake		Westbound exit and eastbound entrance
0.0000.0001
 I-80 east (US-189 north) – CheyenneModule:Jct warning: "road" parameter is deprecated		Westbound exit and eastbound entrance; west end of unsigned US-189 overlap
​1.3092.1072Silver Summit
​3.9986.4344Park City, Kamas (SR-248)
Wasatch​8.24613.2718Mayflower (SR-319)
​13.03320.975East end of freeway
​13.24821.321 SR-32 – Francis, Kamas, Midway
Heber City17.00627.369 SR-113 (100 South)
17.94528.880
 US 189 south – Orem, Provo		East end of unsigned US-189 overlap
Duchesne​68.247109.833 SR-208
Duchesne85.931138.293 SR-311
86.434139.102
 US 191 south (100 West)		West end of US-191 overlap
86.524139.247 SR-87 (Center Street)
​109.538176.284 SR-87
Roosevelt114.576184.392 SR-121 (200 North)
Uintah​130.450209.939 SR-88
Vernal143.787231.403 SR-121 (500 West)
144.285232.204
 US 191 north (Vernal Avenue) – Flaming Gorge, Rock Springs		East end of US-191 overlap
Naples148.242238.572 SR-45 – Bonanza
​157.109252.842 SR-149 – Dinosaur National Monument
​174.624281.030
 US 40 east – Denver, Craig		Continuation into Colorado
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

  1. ^ a b Utah Department of Transportation, Highway Reference Information: Template:PDFlink, updated May 2008, accessed June 2008
  2. ^ Froiseth, B.A.M., Map of the Territory of Utah, 1870
  3. ^ Rand McNally Auto Road Atlas, 1926, accessed via the Broer Map Library
  4. ^ Bureau of Public Roads; American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC: U.S. Geological Survey. OCLC 32889555. Retrieved November 7, 2013 – via University of North Texas Libraries. {{cite map}}: Unknown parameter |last-author-amp= ignored (|name-list-style= suggested) (help)
  5. ^ Utah Department of Transportation, Route 6 history, updated September 2005
  6. ^ Utah Department of Transportation, Route 248 history, updated December 2005
  7. ^ Utah Department of Transportation, Route 40 history, updated October 2005
  8. ^ Utah State Legislature (1953). "Chapter 45: Designation of State Roads". Session Laws of Utah. Route 252. From route 6 west of Myton via Myton Main Street to route 6.
  9. ^ Utah Department of Transportation, Highway Resolutions: Template:PDFlink, updated November 2007, accessed May 2008


U.S. Route 40
Previous state:
Terminus 		Utah Next state:
Colorado
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