Three separate crashes hit the I-15 and Legacy Parkway corridor Monday morning, Aug. 10, closing lanes and ramps on both major commuter routes simultaneously and generating delays of 30 minutes or more for drivers heading to and from Lehi, Alpine, Highland and Cedar Hills.

All three struck during rush hour.

The pileup of incidents began before 7 a.m. when a semi-truck rolled onto its side on southbound Legacy Parkway near milemarker 6, roughly two miles north of the Bountiful exit near West Bountiful. The crash blocked both southbound lanes, and UDOT closed southbound Legacy Parkway at Parrish Lane. Traffic cameras showed backups stretching approximately four miles north to Glovers Lane in Farmington, according to KUTV. UDOT reported 30-plus-minute delays on Legacy Parkway and 20-plus-minute delays on southbound I-15.

On northbound I-15, a concrete mixer being towed by a pickup truck detached and overturned in the roadway at Exit 294 near 9400 South. Utah Highway Patrol Lt. Zach Randall confirmed the exit was closed while crews cleared the scene, KUTV reported. UDOT warned of 30-plus-minute delays on northbound I-15.

A third crash struck the left shoulder of northbound I-15 at SR-194 (2100 North) in Lehi later Monday morning, according to UDOT Traffic. That location sits within UDOT's active $621 million 2100 North freeway connector construction zone, a project that broke ground in March and will run through late 2028, linking I-15 directly to Mountain View Corridor.

No injury information was immediately available for any of the three incidents.

UDOT did not provide an estimated reopening time for Legacy Parkway.

Monday's incidents follow a pattern on the corridor. Two crashes hit northbound I-15 in Lehi within 25 minutes on the evening of Wednesday, July 29, blocking lanes near SR-194 and Timpanogos Highway. UDOT traffic engineers estimate the completed 2100 North connection will save east-west commuters roughly 12 minutes each direction during peak hours, but construction-related lane shifts and shoulder work along that stretch will continue for more than two years.

Residents can report road debris or hazards by dialing 911 or using the UDOT Click N Fix app.