A motorcyclist was injured when she ran into the rear of a slow moving semi tractor in Clay County Thursday afternoon. According to the Highway Patrol, Vinetta Garnett, 54, of Gladstone was Northbound on Interstate 35, just North of Pleasant Valley, when she overtook a semi driven by Senad Hasakovic, 37, of Des Moines, Iowa. Garnett received moderate injuries and was transported to Liberty Hospital.