Dash Cam Captures Terrifying Highway Pileup as Semi Jackknifes Across Lanes Salt Lake City, Utah – November 19, 2025 A commuter’s dash-cam recorded a dramatic multi-vehicle crash on I-15 Wednesday morning after a semi-truck lost control and jackknifed across several lanes, sending cars swerving and spinning in every direction. The footage shows traffic moving normally before a white SUV abruptly fishtails, colliding with the trailer of a passing semi. The impact forces the truck to swing violent