Overnight closures on the westbound Pomona (60) Freeway in Diamond Bar were set to get underway Saturday, with all lanes closed between Lemon Avenue and Diamond Bar Boulevard, according to the San Gabriel Valley Council of Governments.
The westbound freeway was scheduled to be closed from 12:01-6 a.m. Saturday, with another closure planned from 12:01-8 a.m. Sunday.
With the recent completion of closures on the eastbound 60, work has shifted to the westbound side, with weekend closures scheduled through the end of September, officials said.
“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,” according to an SGVCOG statement.
Additional closures are scheduled from 12:01-6 a.m. Saturdays and from 12:01-8 a.m. Sundays on Sept. 19-20 and 26-27.
The following will also be closed:
— Westbound 60 Diamond Bar Boulevard on-ramp;
— Westbound 60 Grand Avenue off- and on-ramps;
— Southbound Orange (57) Freeway connector to the westbound 60; and
— Westbound 60 connector to the southbound 57.
The Grand Avenue Bridge will remain open during all closure windows.
Motorists were urged to avoid the area and use alternate routes or allow for extra driving time.
The work is part of the 57/60 Confluence Project, “a major safety and traffic improvement effort led by the SGVCOG in partnership with LA Metro and Caltrans,” according to the SGVCOG.
The two-mile stretch of freeway has been called one of the worst truck bottlenecks in the United States, with approximately 350,000 vehicles passing through each day, officials said.