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I-405 Motorist Advisory: Advance Weekend I-405 Closures Required to Prepare for “Carmageddon II” Mulholland Bridge Demolition

Friday August 31, 2012

The Los Angeles County Metropolitan Transportation Authority (Metro) and California Department of Transportation (Caltrans) are advising the public that two extended, 10-hour directional freeway closures will be required on the weekends leading up to "Carmageddon II" September 29-30 to prepare the remaining half of the Mulholland Bridge for its final demolition.

The I-405 Sepulveda Pass Improvements Project contractor will remove the supporting wood structures called "falsework" from the newly constructed south bridge side and will adjust Mulholland Drive's roadway alignment and elevation to meet the bridge's new approaches.

The schedule for freeway and Mulholland Drive closures follows:



Southbound:  Directional  full freeway closure between U.S. 101 freeway to the Getty Center Dr. ramps;

southbound U.S. 101 and northbound U.S. 101 to southbound I-405 connector ramps

Saturday, Sept. 8, at 11 p.m. to

Sunday, Sept. 9, at 9 a.m.

Northbound: Directional  full freeway closure between the Getty Center Dr. ramps to the Ventura off-ramp;

southbound U.S. 101 and northbound U.S. 101 to southbound I-405 connector ramps

Saturday, Sept. 15, at 11 p.m. to

Sunday, Sept. 16, at 9 a.m.

Mulholland Bridge Closure

Friday, Sept. 14, at 10 p.m. to

Sunday, Sept. 16, at 8 a.m.

Mulholland Drive, from the west side of the bridge to Casiano Road

Friday, Sept. 21, at 10 p.m. to

Monday, Sept. 24, at 6 a.m.

+Due to the extended duration of the closures that will start earlier at night and continue later into the morning weekend hours, motorists are advised to plan ahead, avoid the area or eat, shop and play locally.  Motorists should seek alternate routes in advance to avoid traffic gridlock.  Sepulveda Boulevard will remain open as a primary alternate route.

Caltrans will list the upcoming directional freeway closures on its changeable message signs in the project area beginning Saturday, September 1.

Directional freeway closures are necessary for the contractor to completely remove temporary bridge supports over the center of the freeway without creating a safety risk to passing motorists.

Emergency vehicle access will be maintained.  Pedestrians will be rerouted to a safe area outside of the construction zone. Construction work is weather permitting and subject to change.

During "Carmageddon II" weekend Sept. 29-30, construction crews will remove the last-standing bridge span and two column sets, work that will require a full 53 hours to complete due to approximately 30 percent more demolition activity than the previous year, as well as the presence of inactive utilities.  The public is urged to cooperate with authorities once again and stay off local roads and freeways to help mitigate potentially severe congestion impacts.

Additional limited duration weekend freeway lane closures will be necessary following the demolition of Mulholland Bridge to enable the contractor to continue bridge rebuilding efforts.  Metro will release additional closure information as it becomes available.   Bridge reconstruction is expected to be completed next year.

For a listing of daily closures and latest updates visit our website at or follow us on twitter: and Facebook at

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