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Northbound I-405 / I-105 Interchange Reconstruction in Final Phase

Project Description:

HAWTHORNE - The California Department of Transportation (Caltrans) has reconstructed the following two connector ramps:

The northbound I-405 (San Diego Freeway) connector to eastbound I-105 (Century / Glenn Anderson Freeway) was closed for 14 weeks for reconstruction. It re-opened at 5 a.m. on January 3, 2018.

The northbound I-405 connector to westbound I-105 was closed for almost 12 weeks for reconstruction. It re-opened at 3 a.m. on March 24, 2018.

Our contractor is now reconstructing and repaving one final lane of the collector road leading up to the two connector ramps. This stage of construction is scheduled to continue for several more months. At least one lane of the collector road will remain open to traffic 24/7, with the exceptions that it may be closed overnight occasionally and there may be one 55–hour weekend closure during this time period to complete the project.

The right lane and auxiliary lane of northbound I-405 (San Diego Freeway) approaching Imperial Highway are scheduled to be closed from 10 p.m. *Thursday, Apr. 26 until 6 a.m. *Friday, Apr. 27 to remove K-rail.

When the freeway lanes re-open at 6 a.m. on Friday, April 27, the contractor will also re-open the eastbound El Segundo Blvd. on ramp to northbound I-405 after a long-term closure.

The construction crews may work up to seven days per week, 12 hours per day from   7 a.m. to 7 p.m. Expect noise from the demolition work, machinery and construction vehicles during this time.

When the connector roads are closed, please use the following detour routes


Westbound Detour Route:

From northbound I-405, exit onto Imperial Highway or Century Blvd. westbound. Drivers on the northbound I-405 originating from points south of I-110 (Harbor Freeway) are advised to take northbound I-405 to northbound I-710 or northbound I-110 to westbound I-105 into LAX.

Eastbound Detour Route:

From northbound I-405, exit Imperial Highway, drive east to arrive at I-105 at the Freeman Ave. on-ramp.


Detour signs will be posted. Motorists should anticipate delays, and are encouraged to plan ahead 
and use alternate routes. For real time freeway traffic information, please visit Caltrans 

Photos: Rebuilding northbound I-405 connector to westbound I-105




The long-term connector closure is part of a $4.3 million roadway and embankment repair project on both connectors of I-105, in the cities of Hawthorne and El Segundo. Griffith Company is the contractor on this project which began in March 2017, and is expected to complete fall, 2018. Caltrans reminds motorists to
"Be Work Zone Alert."

Total Programmed Project Costs:$4.385 Million

Project Contact:

Marc Bischoff
Public Information Officer
Twitter: @CaltransDist7


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