News release from Caltrans is below and there’s also more info on the project website:

SR-110 FULL FREEWAY CLOSURE PLANNED

LOS ANGELES – The California Department of Transportation (Caltrans) will close the northbound Arroyo Seco Parkway (SR-110) between Figueroa Boulevard and Avenue 43 from 1 a.m. to 8 a.m. Saturday, June 22. The northbound SR-110 connectors to the northbound and southbound Golden State Freeway (I-5) will be closed at the same time.

Southbound SR-110 will be closed between Orange Grove Boulevard and York Boulevard on June 22 from midnight to 7 a.m.

On Sunday, June 23 northbound SR-110 will be closed between Avenue 60 and Orange Grove Boulevard from 1 a.m. to 9 a.m. Southbound SR-110 will be closed between Avenue 60 and Avenue 52 and then from Avenue 52 to Figueroa Street beginning at midnight and ending at 8 a.m.

Detours will be in place.

The closures are in relation to a slab replacement project from College Street to Orange Grove Boulevard in South Pasadena. All American Asphalt is the contractor on the $800,000 project.

State of California • Department of Transportation
Date: June 20, 2013
District: Los Angeles/Ventura
Contact: Judy Gish
Phone: (213) 897-3487
FOR IMMEDIATE RELEASE