State Route 12 or Scenic Byway 12 (SR-12), also known as "Highway 12 — A Journey Through Time Scenic Byway", is a 123-mile-long (198 km) state highway designated an All-American Road located in Garfield County and Wayne County, Utah, United States.
State Route 186 (SR-186) is a state highway entirely within Salt Lake City, capital of the U.S. state of Utah. It forms a quarter-beltway connecting US-89 and I-15 leading north from Salt Lake City to I-80 leading east; as such, it effectively forms the missing (non-freeway) quarter of the I-215 belt route around the city, though it does not directly connect to I-215 at the north end. Despite this beltway role, the route passes through downtown Salt Lake City because downtown is built right up to the northern mountains surrounding City Creek Canyon. The portion of the route connecting downtown to I-80 is a high-capacity street heavily used by commuters, especially those travelling to the University of Utah or between downtown and eastern neighborhoods, but the portion on Capitol Hill north of downtown is much narrower and has sharp turns around the Capitol grounds. The roadway runs 9.34 miles (15.03 km) along Victory Road, Columbus Street, 300 North, State Street, 400 South, 500 South, and Foothill Drive.
State Route 111 (SR-111) is a state highway in the U.S state of Utah that runs north–south across the west side of the Salt Lake Valley in Salt Lake County. It connects SR-201 in Magna to SR-209 in West Jordan in a span of 10.6 miles (17.06 km). It is known as 8400 West and Bacchus Highway throughout the route's course, in respect of north to south.
State Route 279 is a state highway in the U.S. state of Utah. The highway was constructed in 1962–1963 to service the Cane Creek potash mine and processing plant southwest of Moab. The highway was named one of the most beautiful highways opened to traffic in 1963. The entire length of SR-279 has been designated the Potash – Lower Colorado River Scenic Byway by the Utah State Legislature, however is known locally as Potash Road.
State Route 29 (SR-29) is a state highway in Emery County in the U.S. state of Utah. It runs for 21.732 miles (34.974 km) from the Sanpete-Emery County line near Joe's Valley Reservoir to SR-10 three miles (5 km) north of Castle Dale.
State Route 57 (SR-57) is a state highway in Emery County in the U.S. state of Utah. It runs for 10.69 miles (17.20 km) from the junction with SR-10 three miles (5 km) south of Castle Dale to the Wilberg Coal Mine, northwest of Orangeville.
U.S. Route 191 (US-191) is a major 404.168-mile (650.445 km), north–south U.S. Numbered Highway through eastern Utah, United States. The present alignment of US-191, which stretches from Mexico to Canada, was created in 1981 through Utah. Previously the route had entered northern Utah, ending at US-91 in Brigham City, but with the completion of I-15 it was truncated to Yellowstone National Park and re-extended on a completely different alignment. In addition to a large portion of US-163, this extension absorbed several state routes: SR-33, most of SR-44, and SR-260.
State Route 30 (SR-30) is a state highway in the U.S. state of Utah. It is the only highway signed as a Utah state route to traverse the entire width of the state. Legislatively the highway exists as 3 separate segments. With implied connections via Interstate 84 and U.S. Route 89, the highway is drivable as a continuous route from Nevada to Wyoming. The western segment is a historic corridor paralleling the pre-Lucin Cutoff routing of the First transcontinental railroad. A portion of the eastern segment has been designated the Bear Lake Scenic Byway as part of the Utah Scenic Byways program. The route was created in 1966 by combining several state highways into a single designation.
State Route 16 (SR-16) is a state highway in northeastern Utah, running for 29.359 miles (47.249 km) in Rich County from the Wyoming state line near Woodruff to Sage Creek Junction. It serves as part of a road from Evanston, Wyoming to Jackson Hole, Wyoming.
State Route 21 (SR-21) is a state highway in western Utah, running for 107.575 miles (173.125 km) in Millard and Beaver Counties from the Nevada state line near Garrison to Beaver.
State Route 23 (SR-23) is a state highway in northern Utah, running for 29.890 miles (48.103 km) in Cache County from Wellsville to the Idaho state line on the north end of Cornish.
State Route 37 (SR-37) is a state highway in the U.S. state of Utah, forming a 270° loop through the western part of the Ogden-Clearfield metropolitan area. The route is 12.35 miles (19.88 km).
State Route 59 (SR-59) is a state highway in the U.S. state of Utah. The highway connects Hurricane to the twin cities of Hildale and Colorado City, Arizona. The highway connects to US-89A through Arizona State Route 389. The route was added to the state highway system in 1914, and has had several designations.
U.S. Route 6 (US-6) is an east–west United States Numbered Highway through the central part of the U.S. state of Utah. Although it is only about 40 miles (64 km) longer than US-50, it serves more populated areas and, in fact, follows what had been US-50's routing until it was moved to follow Interstate 70 (I-70) in 1976. In 2009, the Utah State Legislature named part of the route the "Mike Dmitrich Highway", named after the Utah state senator, which generated controversy, as the state of Utah had previously joined with all the other states through which US-6 passes in naming all of US-6 the Grand Army of the Republic Highway.
Lund Highway is a road connecting Cedar City to the ghost town of Lund in Iron County, Utah. Although it is classified as a minor collector, it was once an important connection between the Union Pacific Railroad at Lund and the national parks of southern Utah and northern Arizona.
State Route 122 (SR-122) is a state highway in the U.S. state of Utah, connecting the ghost town of Hiawatha with SR-10.
State Route 74 (SR-74)—also called Alpine Highway—is a state highway in the U.S. state of Utah. It is 5 miles (8.0 km) long, and connects the cities of American Fork and Alpine in northern Utah County.
Utah State Route 123 (SR-123) is a state highway in the U.S. state of Utah. Spanning 11.4 miles (18.3 km), it connects the city of East Carbon with US-6 / US-191 in Carbon County.
State Route 218 (SR-218) is a state highway in the U.S. state of Utah. Spanning 8.2 miles (13.2 km), it serves as an east/west rural connector, connecting the town of Newton on SR-23 with the city of Smithfield on US-91 in Cache County.
SR-123 (Whitmore Canyon Road) in East Carbon 
