I-15 north of Salt Lake City, Utah, is a busy eight-lane highway that handles approximately 140,000 vehicles per day. It’s also a highway that recently underwent repairs on a 5.11-mile section between Centerville and Farmington. Since I-15 is the primary route into and out of Salt Lake City on the north side of town, UDOT placed significant restrictions on the work window for the project. Construction had to be completed within 90 calendar days, with a lane closure length limit of 2.5 miles and a working time window of seven hours each night.