Two people had to be rescued after they were trapped in a tractor-trailer that overturned early Thursday on the I-285 westbound ramp to I-75 southbound in Clayton County, officials said.

The men were identified as Jimmy Simmons Jr., 59, and Alonzo Holmes, 58, both of Plant City, Fla., said Sgt. Ashanti Marbury of Clayton County police.

Two people were trapped in a tractor-trailer Thursday on I-285 westbound at I-75 southbound in Clayton County. Both were rescued. JOHN SPINK / JSPINK@AJC.COM
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About 6:20 a.m., Simmons, the driver, was trying to negotiate the curve from I-285 to I-75 when the truck had a mechanical malfunction, causing him to lose control, Marbury said. The truck struck the guardrail and veered off the ramp.

Both men were seriously injured. JOHN SPINK / JSPINK@AJC.COM
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After about 40 minutes, Clayton fire crews freed Simmons from the wreck, Marbury said. Holmes was freed after slightly more than three hours. Both are in serious condition at area hospitals.

Traffic delays were heavy in the area for several hours after the crash. Lanes reopened shortly after noon.