Two massive concrete beams fell on I-35 between Dallas and Austin on Thursday morning, killing 1 and injuring 3 other.
Investigators believe a semi truck caused the bridge collapse when it slammed into an overpass under construction.
Norberto Martinez, who heard the crash, said, "It was the two beams, fell on top of cars and the 18 wheelers. I worried so much, in fact I started praying for them"
Three signs posted two miles before the overpass warn of the its height. Authorities are investigating why the truck driver seems to have ignored them.
"Were looking at the driver, the truck itself, and also the roadway," Harpin Myers from Texas Department of Safety said.
Oversized vehicles hit bridges almost 13,000 times in the United States in 2013 alone.
The collision in Texas closed one of this states busiest interstates all day - while crews cleared debris and the crushed pickup truck where one man lost his life.