Event Brief
Westbound I-60 closures start in Diamond Bar
By The BriefBrief · Sources (1)
Filed: Aug 26, 2026 at 10:00 AM ET
Summary: Overnight closures of the westbound 60 Freeway in Diamond Bar will begin Saturday, with all lanes fully closed between Lemon Avenue and Diamond Bar Boulevard. The weekend shutdowns run 12:01–6 a.m. Saturdays and 12:01–8 a.m. Sundays, with additional closures scheduled on Sept. 5–6 and Sept. 12–13, 19–20, and 26–27.
WHO: San Gabriel Valley Council of Governments (SGVCOG)
WHAT: All lanes closed on westbound 60 Freeway between Lemon Avenue and Diamond Bar Boulevard during overnight periods for construction-related improvements.
WHEN: Aug 26, 2026
WHERE: Diamond Bar (westbound 60 Freeway between Lemon Avenue and Diamond Bar Boulevard)
WHY: The closures are necessary to safely accommodate ongoing construction activities and advance safety and traffic-flow improvements at a heavily traveled interchange.
ℹ️ This event is analyzed using pattern arcs, velocity indicators, and source analysis in our MI Console.
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