The northbound Santa Ana (5) Freeway be closed between Valley View and Rosecrans avenues from about midnight until 5 a.m. Thursday to accommodate paving crews, according to Caltrans.
The connector from the westbound Artesia (91) Freeway to the northbound Santa Ana Freeway also will be closed, as will the on-ramps at Valley View Avenue, Alondra Boulevard and Carmenita Road.
Traffic will be taken off the westbound 91 and routed onto the northbound San Gabriel River (605) Freeway, then back to the northbound 5 freeway.
Six broken slabs of pavement are being repaired.