The construction has begun on the St. George Boulevard Interchange. The interchange is going to be converted into a Diverging Diamond Interchange (DDI) to help with traffic flow. Here is the project map from UDOT to show what the will be happening.

Most of the construction will be done at night during the following hours:
Sunday – Thursday 10:00 PM until 6:00 AM
Friday 11:00 PM until 7:00 AM
Saturday 11:00 PM until 8:00 AM

The estimated completion date is December 31, 2013.
For more information check out the UDOT website.