This post has been updated. See note below for details.

It's not exactly Carmegeddon, but portions of the 405 Freeway will be closed for six nights starting Friday as reconstruction of the Mulholland Drive bridge continues.

During those nights, either north or southbound lanes of the 405 Freeway will be closed to traffic in West Los Angeles, spanning from the 101 Freeway to Getty Center Drive, according to a notice from Metro and Caltrans.

Workers will be installing temporary girder plates above each bridge span to help support the structure during the reconstruction process. It's being rebuilt as part of a $1-billion 405 Freeway capacity improvement project.

Beginning at 10 p.m. Friday, closure of northbound lanes is set to begin, with full closure of those lanes from midnight through 5 a.m., from Getty Center Drive toVentura Boulevard.

On Monday and Tuesday, southbound lanes will begin being closed at 10 p.m., with full closure of the northbound lanes from midnight to 5 a.m. It will be the same March 12-13.