Interstate 123 (I-123) is a spur auxiliary route of Interstate 23 (I-23), located entirely within Washington County in the southwestern part of the U.S. state of Utah. It is a 13.44-mile (21.62 km) spur Interstate highway connecting the St. George area, the cities include Santa Clara, St. George, and Washington. I-123 begins at a stoplight interchange at State Route 18 (UT 18, South Bluff Street) south of downtown St. George, to an interchange with Interstate 15 (I-15) in the city of Washington.
I-123 is also known as the St. George Parkway. It also have direct access to Arizona (via I-15 south) and Nevada (via I-23 north giving another direct access to Intertropolis, Nevada and Routeville, Utah, Highway City).
Route description[]
Interstate 123 begins at a stoplight interchange at South Bluff Street (UT 18) south of downtown St. George. I-123 travels in the southwestward direction to the westward direction. At 5 miles (8 km) from downtown, I-123 turns to the northward direction as it heads to Santa Clara. As the highway approaches in Santa Clara, it then has an interchange with UT 8 (Sunset Boulevard), former US 91. I-123 turns right to the eastward direction and serves as a city line route between Santa Clara and Ivins. I-123 interchanges with UT 300 (Snow Canyon Parkway) and in about 1.2 miles (2.0 km), it once again interchanges UT 18 (North Bluff Street). As I-123 continues in northern St. George, it has a cloverleaf interchange with its parent highway, I-23, which gives direct access north to Routeville, Highway City. After a few miles from the I-23 interchange, I-123 turns to the southward direction as it heads to Washington, where it ends at an interchange with I-15.
See also[]
- Interstate 221
- Interstate 15 in Utah
- Interstate 23 in Utah
- Interstate 21 in Nevada
- Utah State Route 8
- Utah State Route 18
- Utah State Route 34
- Utah State Route 300