There were two cars and two semi-trucks involved in the I-75 accident. A semitrailer truck that was carrying temporary barriers from a construction site was hit in the trailer by the first car, a Mitsubishi.
The car was then caught up underneath the trailer as it continued down the road. The driver of the Mitsubishi was killed under the semi; the passenger of that car is now in the hospital in critical condition.
The second car, a BMW, hit the back corner of the trailer and, upon impact, some of the cement barriers fell on top of the BMV. The driver of the car was also killed in the accident. A few of the cement barriers were left in the road and were hit by a second semi-truck that then hit the first semi truck again.
The following informaiton was provided by the Texas Department of Transportation (TxDOT):