LOS ANGELES -- Traffic was flowing again on the city's busiest freeway following a weekend closure that was hailed a success by Mayor Antonio Villaraigosa after it didn't result in the "Carmageddon" of epic traffic jams.

Bridgework that forced the closure of Interstate 405 was completed and lanes of the freeway through the Sepulveda Pass began reopening Sunday night, hours ahead of a planned reopening for the Monday morning commute. The first drivers allowed back on the roadway cheered and honked their car horns as news cameras rolled.