The California Department of Transportation will close the Southbound State Route 57 Katella Avenue on-ramp on Tuesday, May 20, and Wednesday, May 21. The closures will allow Caltrans crews to perform bridge and electrical work. The ramp will be closed from 9 a.m.-2 p.m., Tuesday, and from 9 a.m.-1:30 p.m., Wednesday. Detour signs will be in place. For more information, call the Caltrans District 12 Public Information Office at 949-724-2000 or visit www.dot.ca.gov/dist12.