I-405 Improvement Construction Updates

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:

NB I-405 Loop On-Ramp to Close

Crews will close the northbound I-405 loop on-ramp from Seal Beach Boulevard for approximately one month to accommodate the freeway widening. The closure is anticipated in mid- to late-April.

Detailed schedule, closure and detour information will be provided before the closure.

SB I-405 Goldenwest Street On-Ramp Closed

Crews closed the southbound I-405 loop off-ramp to Bolsa Avenue and the southbound I-405 loop on-ramp from Goldenwest Street to accommodate the freeway widening.

The SB I-405 loop off-ramp 405

to Bolsa is anticipated to reopen in approximately two months. The SB I-405 loop on-ramp from Goldenwest closed March 12 and is anticipated to reopen in approximately four months.

Bolsa Avenue

Crews are constructing the sound wall along southbound I-405 between the Bolsa Avenue bridge and the railroad. Construction is ongoing, 7 a.m.-4 p.m. on weekdays and Saturdays, as needed for approximately one week. This work will also include intermittent nighttime lane reductions on SB I-405, between Bolsa Avenue and McFadden Avenue. Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup. Email 405project@octa. net or call (888) 400-8994 for more information.