Bus Video Gives More Info About Pittsburgh Bridge Collapse

The National Transportation Safety Board (NTSB) says this image is from the curbside camera of the bus involved in the collapse of the Fern Hollow Bridge in Pittsburgh and shows that at nearly the same time, the west end of the bridge had already fallen off the west abutment (the red arrow points to the abutment). National Transportation Safety Board via AP

HARRISBURG, Pa.—Video footage from a bus of the bridge collapse in Pittsburgh this year shows one end of the structure had already fallen when an expansion joint at the other end was pulling apart, federal investigators said Thursday.

The National Transportation Safety Board issued an update on the Fern Hollow bridge collapse, saying the video is giving them more information about the sequence of events.