SEAL BEACH, Calif. -

One of Southern California's busiest freeways reopened ahead of schedule after workers finished demolishing an old bridge.

The work along a 4-mile strip of Interstate 405 in Orange County raised fears of historic traffic jams. But officials reported no major tie-ups, although traffic was thick  around some detours.

The southbound lanes reopened about  2:30 p.m., more than two hours ahead of schedule. The northbound side followed about an hour later. Some freeway ramps were still being cleared.

The closed section of I-405 is near its junction with State Route 22 and Interstate 605.