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405 Freeway Update

The Orange County Transportation Authority, in cooperation with Caltrans, is widening the San Diego Freeway (I-405) between SR-73 and I-605.The project is improving 16 miles of I-405 between the SR-73 freeway in Costa Mesa and I-605 near the Los Angeles County line. Construction updates are as follows: Sidewalk Closures on Seal Beach Boulevard Crews closed the sidewalks at the intersection of Seal Beach Boulevard and Lampson Avenue for permanent traffic signal construction. Activities include the removal of existing sidewalk ramps, installation of new sidewalk ramps, electrical and foundation work.

Permanent traffic signal construction began June 1, and will continue through September.

Daytime work hours are 9 a.m.-3 p.m.

Seal Beach Boulevard and Lampson will be intermittently reduced to two lanes at the intersection for the duration of

the work.

NB I-405 Loop Off-Ramp to Bolsa Avenue Closed

Crews closed the northbound I-405 loop off-ramp to Bolsa on June 18 for approximately three months to accommodate the freeway widening. It should reopen this month.

SB I-405 Off-Ramp to Bolsa Chica Road Closed Crews closed the southbound I-405 off-ramp to Bolsa Chica on Oct. 27, 2020; it will remain closed for about three more months to advance construction on the Bolsa Chica bridge.

SR-22 On-Ramp from Old Ranch Parkway Closed The Old Ranch Parkway onramp to the westbound SR-22 closed April 13 for eight months to accommodate freeway widening. Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving. Work hours are from 7 a.m.-4 p.m. Crews may mobilize equipment as early as 6 a.m.

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