Reconfiguring the 405: Short Term Pain, Long Term Gain

Project will add a 10-mile HOV lane, new bridges

Starting Tuesday, traffic on the 405 will get worse before it gets better. All northbound lanes from National Blvd. to the I-10 will be temporarily closed at midnight as construction along a 10 mile stretch begins, according to Metro.

The I-405 Sepulveda Pass Widening Project will add a 10-mile HOV lane on the northbound I-405 between the I-10 and US-101 Freeways. In addition, the Skirball Center, Sunset Blvd. and Mulholland Dr. bridges will be replaced. Several off-ramps and underpasses will be reconfigured and approximately 18 miles of retaining wall and sound wall will be built.

The first phase began January 6th when contractors closed some lanes to perform surveys of underground utilities. On Tuesday, concrete barriers will be put in place on a 10 mile stretch of the shoulder of the 405 to isolate the construction zone, the website said.

Northbound lanes will begin closing at 7:00pm with the entire northbound section closing at midnight from National to the 10 Freeway, according to Metro. Lanes were scheduled to re-open at 5:00am.

Officials say the project will reduce traffic congestion, reduce air pollution, and improve safety in heavily congested areas.

Maps and detour information are available at

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