The southbound I-405 freeway, between the I-605 freeway and Seal Beach Boulevard, will be closed nightly for several weeks beginning Thursday, Jan. 12.

Nighttime closures on this stretch of the southbound I-405 freeway will take place seven days a week; between 11 p.m and 5 a.m., Monday through Friday, and between 11 p.m. and 7 a.m., Saturday and Sunday. The work will last approximately three to four weeks.

Full closures of the southbound I-405 freeway are necessary to allow crews to install falsework spanning over the freeway, as part of the northbound I-405 / westbound SR-22 / 7th Street connector reconstruction.

Recommended Detours:

From the southbound I-405, exit Studebaker Road - stay in the right lane and proceed south on Studebaker Road, turn left on Westminster Avenue, then select one of the three detour routes below:
From the southbound I-605 freeway, take the Spring Street exit and turn right, proceed west on Spring Street and turn left on Studebaker Road, turn left on Westminster Avenue, then select one of the three detour routes below:
To access the SB I-405 freeway continue east on Westminster Avenue and turn left on Seal Beach Boulevard and proceed north to the SB I-405 on-ramp
To access the SB I-405 freeway continue east on Westminster Avenue to access the SB I-405 on-ramp
To access the EB SR-22 freeway continue east on Westminster Avenue and turn left on Goldenwest Street to access the EB SR-22 on-ramp