A Nampa man is dead after a wreck that backed up traffic for hours on Interstate 84 Monday afternoon. 

The crash happened at 4:22 p.m. on the eastbound side of I-84 near the Black Cat overpass. 

According to Idaho State Police, 29-year-old Clark Nelson was riding a 2012 Suzuki motorcycle at "a high rate of speed" when he lost control. Nelson veered onto the left shoulder and slammed into a broken-down Honda Pilot that was parked in the median.

The motorcycle then sideswiped a 2010 Ford Explorer. Nelson was thrown from his motorcycle in the collision.

Police say Nelson was wearing a helmet, but died from his injuries at the scene. 

Three lanes of I-84 were blocked for hours as emergency responders worked, causing major delays and backups on the interstate. All lanes were back open by 6:45 p.m. 

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