Metro shut down three of the five northbound lanes from Montana Avenue to Getty Center Drive Saturday so crews could work on the widening project.
At about 9 p.m. Saturday, one of the lanes reopened, but traffic remained heavy. The rest of the lanes reopened overnight. The lanes were supposed to close through 5 a.m. Monday.
Workers are moving the center median and are repaving and re-striping that 2.4-mile stretch of the freeway. The construction is part of the $1 billion Sepulveda Pass Improvement Project, which aims to create a 10-mile HOV lane along the 405 Freeway from the 10 to the 101.