Here's the news release from Metro:
The I-405 Sepulveda Pass Improvements Project will implement a full directional northbound freeway closure for approximately one-mile from the I-10 connector to the Olympic Boulevard on-ramp for the nights of Friday, April 12, Saturday, April 13, and Sunday, April 14, 2013.
The full northbound freeway closure is scheduled to prepare roadway and stage k-rail for additional lane and median construction.
Scheduled closure times:
Friday: Lane reductions at 11 p.m., full northbound closure at 1 a.m., open at 6 a.m.
Saturday: Lane reductions at 11 p.m., full northbound closure at 1 a.m., open at 7 a.m.
Sunday: Lane reductions at 11 p.m., close at 12 a.m., open at 5 a.m. Monday .
The northbound Olympic Boulevard on-ramp will be closed during the freeway closure.
Northbound Detour: From Olympic Boulevard, go north on Cotner Avenue to the northbound Santa Monica Boulevard on-ramp. From northbound I-405, exit to the westbound I-10, exit Bundy Drive North, go east on Santa Monica Bl to the northbound I-405 on-ramp.
Construction is dynamic and schedules are subject to change without notice. Work activity is subject to weather conditions.
For additional project information and ongoing construction updates, visit www.metro.net/I-405 or call the project hotline at 213-922-3665. The latest updates are also available on Twitter at www.twitter.com/I_405.