BIG SPRINGS, Neb. (AP) — One westbound lane of I-80 was reopened Sunday after crews spent the night removing debris from a fatal crash that caused a bridge to collapse on the nation's busiest highway.

Half of the collapsed overpass had been removed by morning. Workers spread sand over the interstate surface to minimize damage as overpass sections were cut away.

"Things are moving faster that we thought," said Chris Peterson, spokesman for Gov. Mike Johanns.

The bridge collapsed Friday night after a tractor-trailer slammed into its center support column. The driver, 47-year-old Douglas W. Lohmeyer of Blue Springs, was killed.

The cause of the crash is still under investigation.