Pre 1977 state route number
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Route description
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Post 1977 state route number
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Notes
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1
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Legislative designation for I-15 also US-91 prior to 1974.
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15
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[3]
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2
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Legislative designation for I-80
|
80
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[3]
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3
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Legislative designation for I-84
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84
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[3]
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4
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Legislative designation for I-70
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70
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[3]
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5
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Legislative designation for Interstate 215
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215
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[3]
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6
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Legislative designation for US-40
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40
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SR-6 immediately re-used as legislative designation for US-6[3]
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7
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Legislative designation for US-189
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189
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SR-7 was later re-used for an unrelated highway.[3]
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8
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Legislative designation for U.S. Route 89 from Moark Junction to north of Lehi
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89
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SR-8 was later re-used for an unrelated highway.[3]
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9
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Legislative designation for current US-191 between Crescent Junction and Monticello and US-491 between Monticello and Colorado. At one time these highways had a single signed designation, U.S. Route 160
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163, 666
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SR-9 was immediately re-used on an unrelated highway. This portion of 163 has since been re-numbered 191, and 666 has been completely replaced with 491.[3]
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11
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Legislative designation for US-89 and US-89A from state line to junction with I-70
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89/89A
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Kept and signed as designation for US-89A south of Kanab. Formally replaced with route 89A in 2008.
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13
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Legislative designation for US-89 from Logan to Bear Lake
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89
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SR-13 immediately re-used for an unrelated route.
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15
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Zion Park Scenic Byway
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9
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SR-15 immediately re-used as the legislative designation for I-15[1]
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16
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Route along the western shore of Bear Lake from the Wyoming state line near Woodruff to the state line near Paris, Idaho
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16, Eastern segment of 30, 89
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Route truncated, the southern portion remains SR-16 today, while the northern portion was transferred to other routes, including the part signed as US-89.
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26
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A signed route between Delta and Salina, now part of US-50.
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50
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SR-26 immediately re-used for former SR-50. SR-50 and 26 exchanged designations[3]
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27
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Legislative designation for US-6 from the Nevada state line to Green River
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6
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[3]
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28
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Route formerly continued south of its current terminus at Gunnison as a legislative designation for a portion of US-89 to Salina
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89, 28
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Portion used for US-89 truncated, independent portion kept[3]
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32
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Legislative designation for U.S. Route 89 from SR-28 at Gunnison to US-6 at Thistle, Utah
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89
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SR-32 eventually reused for a former portion of U.S. Route 189[3]
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35
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Route formerly continued north from current terminus as the legislative designation for US-189 north to I-80
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189, 35
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Portion used for US-189 truncated, independent portion kept[3]
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40
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North–south road west of Ogden
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134
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SR-40 immediately re-used as the legislative designation for US-40[3]
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47
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Legislative designation for U.S. Route 163 from Arizona to Monticello, was signed prior to 1971.
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163
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North of Bluff has since been redesignated US-191[3]
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49
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Legislative designation for US-89 between I-15 near Lagoon to I-84 near Ogden
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89
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[3]
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50
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Riverdale Road in Riverdale and Ogden
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26
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SR-50 immediately re-used as the legislative designation for US-50. SR-50 and 26 exchanged designations[3]
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51
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Connector between SR-16 and the Wyoming state line in the far north eastern corner of Utah
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Eastern segment of 30
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69
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Alternate route between Brigham City and Logan via Bear River canyon.
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Central segment of 30, 69
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The southern portion of the route (south of Deweyville) kept the SR-69 designation; later extended north to Collinston; to be later renumbered SR-38
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70
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Route along the north shore of the Great Salt Lake in extreme northern part of the state
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Western segment of 30
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SR-70 immediately re-used as the legislative designation for I 70.[3]
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80
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Alpine Loop Scenic Byway
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92
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SR-80 immediately re-used as the legislative designation for I-80[3]
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84
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Segment of former US-91 near Roy
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126, 13
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SR-84 immediately re-used as the legislative designation for I-84[3]
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85
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Legislative Designation for the reroute of US-91 bypassing downtown Brigham City
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91
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[3]
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89
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Bypass of Eden, Utah
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169
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SR-89 immediately re-used as the legislative designation for US-89[3] SR-169 has since been removed from the state route system.
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102
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East of Lampo Junction to Deweyville
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30, 102
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|
106
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Becks to Farmington (part was the legislate route of US 89)
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89, 106
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151
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Legislative designation for US-189 from Francis to Hailstone Junction
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189
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163
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Segment of former US-91 near Levan
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78
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SR-163 immediately re-used as the legislative designation for US-163[2]
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169
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Legislative designation for US-89 from SR 106 in Bountiful to north of Bountiful
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89
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|
259
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Legislative designation for US-89 from Kanab to the Arizona border
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89
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|
271
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Legislative designation for U.S. Route 89 from Near Draper Crossroads to SR 106 in Becks
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89
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