MONROVIA, CA—To advance critical safety and traffic flow improvements at the SR-57/SR-60 Confluence, the San Gabriel Valley Council of Governments (SGVCOG) will implement five weekend overnight closures of eastbound State Route 60 (SR-60) in Diamond during the month of August.
All lanes on eastbound SR-60 will be fully closed between Lemon Avenue and Diamond Bar Boulevard during overnight hours each weekend in August. The closures are necessary to safely accommodate ongoing construction activities and advance improvements designed to enhance safety, improve traffic flow, and reduce congestion at one of the region’s most heavily traveled and hazardous freeway interchanges.
The closures are as follows and are subject to change:
Closure Hours:
- Saturday mornings: 12:00 AM – 6:00 AM
- Sunday mornings: 12:00 AM – 8:00 AM
Scheduled Dates:
- Weekend 1: August 1 & 2
- Weekend 2: August 8 & 9
- Weekend 3: August 15 & 16
- Weekend 4: August 22 & 23
- Weekend 5: August 29 & 30
Ramp, Connector & Streets Impacted
Closed:
- Northbound SR-57 connector to eastbound SR-60
- Eastbound SR-60 Grand Avenue off-ramp
- Eastbound SR-60 Grand Avenue on-ramp
Open:
- Eastbound SR-60 connector to southbound SR-57
- Northbound SR-57 Pathfinder Road on-ramp (Open only for motorists connecting to westbound SR-60)
- Eastbound SR-60 Lemon Avenue on-ramp (Open only for motorists connecting to southbound SR-57)
- Grand Avenue Bridge (Will experience partial lane closures, but will remain open)
Detour signs will be clearly posted along the route. Drivers are strongly encouraged to avoid the area and use alternate freeway routes or allow for significant extra travel time. Construction schedules are subject to change due to inclement weather or other unforeseen circumstances.
The SR 57/60 Confluence Project is a major safety and traffic improvement effort led by the SGVCOG in partnership with LA Metro and Caltrans. According to the American Transportation Research Institute (ATRI), this two-mile long stretch of highway is ranked as the worst truck bottleneck in California and the seventh-worst in the nation. This project will address dangerous merging patterns between trucks and commuters, and reduce traffic congestion to make one of the nation’s busiest corridors, carrying approximately 350,00 vehicles a day, safer and more efficient for everyone. For information about the project, visit sgvcog.org/5760project or @5760Project on social media.
