The Utah Dept. of Transportation has completed the Utah County I-15 Corridor Expansion project. Construction was finished in an unprecedented 35 months, making I-15 CORE the fastest billion-dollar public highway project ever built in the United States. I-15 CORE reconstructed 24 miles of freeway from Lehi to Spanish Fork.
The project widened the freeway by two lanes in each direction; replaced the original asphalt with new 40-year concrete pavement, extended the Express Lane from Lehi’s Main Street to Spanish Fork and rebuilt or replaced 63 bridges and 10 freeway interchanges.