The California Department of Transportation (Caltrans) announces an extended weekend closure of southbound State Route 57 (SR-57) from SR-57/SR-60 Interchange to Pathfinder Road for paving work. Closure is scheduled to begin Friday, August 26 through Monday, August 29. This will include the Long Term Closure of Southbound Diamond Bar Boulevard on- and off-ramps from August 29, 2022 through December 16, 2022.
Full closure of southbound SR-57 from SR-57/SR-60 Interchange to Pathfinder Road
• Friday, August 26 from 10 p.m. to 6 a.m.
• Sunday, August 28 from 10 p.m. to 5 a.m.
Saturday, August 27 from 6 a.m. through Sunday, August 28 to 10 p.m.
• Up to 3 lanes open on southbound SR-57 from SR-60 Interchange to Pathfinder Road