Business Loop I-15 / State Route 34 - St. George

Business Loop I-15Utah State Route 18Utah State Route 34

Utah State Route 34 (St. George Boulevard) overlaps the east-west leg of Business Loop I-15 through the city of St. George. The state route measures 2.15 miles from SR 18 (Bluff Street) west of Downtown to River Road / Red Cliffs Drive just east of the diverging diamond interchange (Exit 8) with Interstate 15. The north-south leg of Business Loop I-15 overlaps with SR 18 for 1.985 miles between St. George Boulevard and Interstate 15 at Exit 6. Prior to 1974, U.S. 91 followed St. George Boulevard from Bluff Street to Red Cliffs Drive.

Both ends of Business Loop I-15 originally comprised trumpet interchanges. Each exchange was rebuilt as conventional diamond interchanges by 1993. Subsequent changes at the south end reconfigured the interchange into a narrower footprint with longer ramps. Work completed in April 2009 included building a new, wider span for Bluff Street over I-15.1

The north end was reconfigured into a diverging diamond interchange (DDI) during a $16 million design-build project. Work started on June 29, 2013.2 The new ramp configuration opened to motorists on November 19 and final construction wrapped up by December 19, 2013.3

References:

  1. I-15 Bluff Street « Wadsworth Brothers.
  2. "Residents given preview of Exit 8 Interchange construction." St. George News (UT), June 28, 2013.
  3. "St. George Boulevard-I-15-Exit 8 diverging diamond interchange now open." St. George News (UT), November 19, 2013.

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Page Updated Friday June 29, 2018.