California ? A highway overpass that was under construction collapsed Tuesday, crushing a delivery truck and seriously injuring a construction worker who clung to a steel beam as it tumbled 50 feet to the ground.

The driver, Robert Sylvester, 45, of Chico, was pulled free about 2 1/2 hours after he was trapped. He suffered only a sprained ankle and minor cuts.

The construction worker, Jeffrey Doll of Olivehurst, who was on top of the structure, also was injured when it collapsed about 7:15 a.m.

Doll, 39, was in serious condition with a fractured pelvis, fractured left elbow and broken lower left leg at the hospital in Chico.