Both lanes of US 41 northbound in Fort Branch are now open again to traffic.
They were shut down following an accident on Thursday afternoon between a minivan and a semi.
Gibson County Sheriff George Ballard says 87-year-old Leonard Knowles and his wife 87-year-old Doris Knowles were extricated from the van.
He tells us the semi driver, Philip Roberts of Ohio, did not receive any injuries.
Ballard says the elderly victims are from Mt. Carmel, Illinois and Leonard was the minivan driver.
Two medical helicopters took the victims to Deaconess Hospital in serious condition.
The van is a total loss.
Ballard says Leonard Knowles told Gibson County Deputies that the semi-truck was barely moving because of traffic that had backed up due to the earlier accident on 41.
Leonard says he believes he may have fallen asleep and thinks that's what caused their van to hit the back of the semi.
The sheriff's office is investigating. No word yet on whether there are going to be any charges.
Both Philip and Leonard were tested for alcohol and drugs.
This is the second accident in just a matter of hours on US 41 northbound.
Earlier in the day, US 41 at SR 168 was closed due to a two-vehicle wreck.
ISP says the driver and passenger in a minivan had minor injuries. Gibson Co. Sheriff Ballard says one of the vehicles involved rolled over and one person was taken to the hospital.
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