State Route 281 served Dixie College (now Utah Tech University) in St. George until 1991.

State Route 283 served the College of Eastern Utah in Price until 2001, running north from SR-55 (100 North) along 300 East and then looping around the college for a total distance of about 1.33 miles (2.14 km).

It consists of a three-quarters loop with two outlets onto SR-203 (Harrison Boulevard) and two more onto Taylor Avenue and Skyline Parkway.

State Route 285 runs for 0.333 miles (0.536 km) from 20th Street northwest to Monroe Boulevard.

[citation needed] The road was added to the state highway system in 1935 as part of SR-182,[16] and became SR-285 in 1969.

I-15 was built over the former US 91 by 1971, at which time SR-287 was reconnected to the state highway system via the new frontage road and 14600 South.

State Route 291 runs for 0.565 miles (0.909 km) from Harrison Boulevard in Ogden, across from 7th Street, east to and around the Utah Schools for the Deaf and the Blind.

[32] It was created in 1935 as State Route 182, running along 20th Street from SR-1 (US-89) east to the former campus at Monroe Boulevard.

[35] This route was deleted in 1963 as a transfer for 12th Street, which was designated SR-205,[34] but in 1968 the roads at the old sanitorium, then a new campus of the Schools for the Deaf and the Blind, were readded as part of SR-182.

The roads on the capitol grounds were added to the state highway system in 1935 as part of SR-181,[39] and were transferred to SR-184 in 1963[40] and split off as SR-293 in 1969.

State Route 295 served the Utah Department of Public Safety's Orem Office until 2003.

The route was created in 1982 but deleted in 2003, since the land had been sold and the office moved to a location with no driver's license test course.

State Route 296 begins on the north side of 700 North, west of 900 East, in American Fork, and loops around the Utah State Developmental Center for 1.424 miles (2.292 km).

State Route 297 served the Utah State Fairpark, including the Utah Department of Public Safety's Fairpark Office and driver's license test course, with a total length of 1.25 miles (2.01 km).

The route was created in 1969 and deleted in 1999, since the Utah Department of Transportation had not maintained the road for some time.

State Route 298 consists of the driver's license test course at the Utah Department of Public Safety's Ogden Office.

It is located in South Ogden on the southwest side of US-89 (Washington Boulevard), east of the Adams Avenue Parkway.

State Route 299 totals 1.03 miles (1.66 km), and includes all the roadways at the Utah Department of Public Safety's West Valley City Office used for driver's license tests.

The former SR-300, about 3.74 miles (6.02 km) in length, was dropped from the state highway system in 1999 to allow the Utah Division of Parks and Recreation to carry out their resource management plan.

State Route 303 lies within Goblin Valley State Park, connecting Goblin Valley Road, a county road, with the overlook, a distance of 1.770 miles (2.849 km).

[61] It was created in 1972, and was initially located farther southeast, at Center Street and 500 South; this is still where the route is defined in state law.

It was created in 1972, connecting Arcadia Road to the boat ramp in the park, a distance of about 0.47 miles (0.76 km).

In 1984, the route was removed from the state highway system as a trade for the addition of SR-219 in Enterprise.

It was created in 1972, running about 2.14 miles (3.44 km) from Cottonwood Canyon Road north within the park, and given to Kane County in 2003.

State Route 316 begins at the parking lot in Goosenecks State Park and heads northeast through unincorporated San Juan County for 3.513 miles (5.654 km) to SR-261 north of Mexican Hat.

State Route 317 consists of the roads and parking lots of the Calvin L. Rampton Complex in West Valley City, which serves the Utah Department of Transportation and Department of Public Safety.

State Route 318 begins at SR-9 in Hurricane and runs north for 2.214 miles (3.563 km) through Quail Creek State Park to Red Cliff Road, I-15's east side frontage road in Harrisburg (part of Hurricane).

State Route 320 consists of all roads within the Emergency Vehicle Operations Range of the Utah Peace Officer Standards and Training Academy at Camp Williams, a total of 2.19 miles (3.52 km).

[90] It was created in 1992 "to clarify maintenance responsibility" for the roads, particularly with respect to snow removal.