SANTA FE SPRINGS ( — Caltrans work to demolish an old Carmenita Road Bridge above the Santa Ana Freeway that began over the weekend will require nighttime closures for as long as three weeks.

The freeway is expected to be closed intermittently overnight for seven days a week from Valley Road Road to Rosecrans Avenue.

Closure times are 11 p.m. to 7 a.m. Friday nights to Sunday mornings and midnight to 5 a.m. Monday through Friday.

The closures are subject to change.