From another story that has a bit more details. The bridge wasn’t completed. Was to be finished by 2019.
“...A pedestrian bridge under construction collapsed Thursday less than a week after crews dropped the elevated span in place over the Tamiami Trail in an effort to provide Florida International Univeristy students a safe route across the busy roadway.
The bridge, scheduled to be completed in 2019, collapsed atop an unknown number of people and cars underneath. Police quickly closed the road. It is not known how many people may have been injured in the collapse, which was clearly a major failure of a on-going project not expected to be completed until early 2019...”
An effort to provide safe road crossing by ignoring every safety check and construction method. Unreal. "For the children", of course.