Beginning in early August, the southbound I-15 off-ramp to Provo Center Street will be closed for 90 days for reconstruction, The new ramp configuration will open in the fall, but until then, motorists wishing to access west Provo, Utah Lake State Park, and the airport should use University Parkway to Geneva Road as an alternate route. Downtown and east Provo can be accessed using the University Avenue exit.
Source: udot.utah.gov