Updated 06/19/15 – 11:43 a.m.
CHICAGO (CBS) — Six people were injured Friday morning, when a semi-trailer truck crashed into 13 other vehicles, after the driver apparently fell asleep at the wheel on the Stevenson Expressway.READ MORE: Chicago Weather: Second Sunday Night Tornado Confirmed; Cool And Clear Monday Night
The crash happened around 3:40 a.m., when an Illinois State Police trooper was conducing nightly lane closures for road construction work in the northbound lanes near 1st Avenue in southwest suburban Summit. Thirteen vehicles were stopped on the Stevenson, when a truck plowed into them.
Police said six people were taken to the hospital. Nine other people involved in the crash were evaluated at the scene, but refused further treatment.
Oscar Muniz was among those whose vehicles were hit.
“We just came up to the construction area, and we were stopped, and just then all heck broke loose. We got rear-ended by a semi-truck. I don’t know, about 12 cars or so. You know, a lot of people were lucky, and it could have been a lot worse,” he said. “Thank God that we got out of here alive.”
Many of the vehicles were severely damaged in the crash, but the injuries were not considered life-threatening.READ MORE: Video Of Gruesome Humboldt Park Shooting From CPD POD Camera Was Made Public Without City's Permission, CBS 2 Has Learned
“He moved us pretty good, so it was scary,” Muniz said.
Police said the truck driver admitted falling asleep at the wheel.
All inbound lanes of I-55 were closed for about two hours after the crash, as crews towed away the damaged vehicles.
Police were questioning the driver Friday morning, but no charges had been filed as of 11 a.m.
The truck is registered to Purdy Brothers Trucking, based in Loudon, Tennessee. Purdy Brothers also has an office in Princeton, Illinois, about an hour north of Peoria.MORE NEWS: LIVE UPDATES: 130 Homes Damaged In Tornado In West, Southwest Suburbs As Dangerous Storms Hit Chicago Area Sunday Night
The company’s safety director said they were investigating the crash, and could not comment further.