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.
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The cause of the crash is under investigation.