The southbound 405 Freeway from the 101 Freeway to
Lane closures will begin at 11 p.m., officials said. All lanes will be blocked by 2 a.m. Sunday. Lanes are scheduled to reopen about 7 a.m.
Sepulveda Boulevard will be the suggested detour, but
Northbound lanes will remain open.
The construction is part of the long-running project to add 10 miles of carpool lane on the northbound 405 through the Sepulveda Pass. The effort has been plagued by delays and cost overruns.