A semi hauling approximately 2,400 feeder pigs crashed on the flyover ramp from I-75 North to I-70 West in Vandalia, Ohio, on Monday afternoon.
Officials say the semi took the turn too fast and flipped onto its side.
The driver of the semi estimated that two to three dozen pigs died when the vehicle overturned. He was headed to Illinois from North Carolina, according to authorities.
A tow truck driver, among the workers who helped move the pigs from one trailer to a second one, estimated that 2,400 pigs were in the trailer, the Springfield News-Sun reported.
Authorities worked to right the damaged semitrailer and clean up the scene all evening. The ramp reopened to normal traffic flow sometime before 11 p.m.
The Springfield News-Sun says the state patrol is contemplating a charge of failure to control for the driver, who was not injured.
A similar accident on the same interchange happened in October, also involving thousands of pigs.