A rear-end collision on Highway 12 two miles east of Pasco sent a Kennewick man to the hospital.
The crash happened on the highway at Tank Farm Road just before 4 p.m. Thursday, the Washington State Patrol said.
Radhwan A. Abd, 26, slowed down in a Hyundai when his car was rear-ended by a tractor, the state patrol said. He was taken to Kadlec Regional Medical Center in Richland.
The second driver, Douglas D. Schmidt, 55, of Nebraska, was not injured, the state patrol said.
The cause of the crash is under investigation.