12:30pm |  Portions of the northbound and southbound I-405 freeway between Valley View Street and the I-605 interchange will be closed overnight through Saturday, March 31. Please note, both directions of the I-405 will not be closed simultaneously.
 
NORTHBOUND I-405 FULL CLOSURES: 
The northbound I-405 freeway will be closed from Seal Beach Boulevard to the I-605 between 11:00pm to 5:00am on Wednesday night, March 28; Friday night, March 30; and Saturday night, March 31.
 
The northbound I-405 freeway will be closed from Valley View Street to Seal Beach Boulevard between midnight and 6:00am on Friday night, March 30 and Saturday night, March 31.
 
RECOMMENDED DETOURS: 

From the westbound SR-22:

Exit Valley View Street and turn right, proceed north on Valley View Street and turn left on Katella Avenue, continue west on Katella Avenue to access the northbound I-605 on-ramp OR continue west on Katella Avenue / Willow Street, turn left on Studebaker Road and proceed south to access the northbound I-405 on-ramp. 

From the northbound I-405:

Exit Valley View Street, turn left on Garden Grove Boulevard, turn left on Bolsa Chica Road and proceed south, turn right on Westminster Avenue, turn right on Studebaker Road and continue north to access the northbound I-405 on-ramp.

SOUTHBOUND I-405 FULL CLOSURES:

The southbound I-405 freeway will be closed from the I-605 freeway to Seal Beach Boulevard between 11:00pm to 5:00am Thursday night, March 29.
  
RECOMMENDED DETOURS
 
From the southbound I-405 freeway:

Exit Studebaker Road (stay in the right lane) and continue south, turn left on Westminster Avenue and proceed east to access the southbound I-405 on-ramp – OR – continue east on Westminster Avenue and turn left on Goldenwest Street to access the eastbound SR-22 on-ramp.

From the southbound I-605 freeway:

Exit Spring Street and turn right, turn left on Studebaker Road and proceed south, turn left on Westminster Avenue, continue east on Westminster Avenue to access the southbound I-405 on-ramp – OR – continue east on Westminster Avenue and turn left on Goldenwest Street to access the eastbound SR-22 on-ramp.