City Announces Second Weekend Closure of 101 Freeway through Downtown Los Angeles to Remove Falsework Under Sixth Street Viaduct

LOS ANGELES (Oct. 28, 2021) -- The City of Los Angeles Bureau of Engineering announced today that as part of the City’s on-going construction of the $588 million Sixth Street Viaduct Replacement Project, the Bureau of Engineering and its construction partners, Skanska Stacy and Witbeck (SSW), will close the 101 Freeway through downtown Los Angeles for a second weekend to safely remove bridge falsework under the viaduct. 

The first weekend full closure took place October 22nd to 24th. The work was scheduled to take 41 hours; however the freeway reopened after just 26 hours with no major traffic delays.

Weekend Two Closure: 

Friday November 5, 2021 at 10 p.m. to Sunday November 7, 2021 at 3 p.m.

Reason for Closures

The Bureau of Engineering has completed installation of cable hangers along the arches above the 101 Freeway. That span is now fully supported and no longer requires the supporting falsework under the bridge. The contractor will remove the falsework during the closure.

Location of Closures

The closures will center around the eastside of the viaduct construction site in Boyle Heights, closing a 2.5-mile section of US Rte 101 from the 10/101 split to the 5/10/101 interchange just east of downtown Los Angeles. In addition, motorists travelling west on Rte 60 from the Pomona area will not be able to access US Rte 101. 

Traffic detours will be as follows – SEE DETOUR MAP BELOW


The Bureau of Engineering, under the leadership of City Engineer Gary Lee Moore and in partnership with the City's Bureau of Contract Administration, is leading the Sixth Street Viaduct Replacement Project to replace the original, seismically-deficient structure that was built in 1932. The new $588 million viaduct stretches between Boyle Heights and the Arts District and  is the largest bridge project in the history of Los Angeles. It is funded by the Federal Highway Administration and the California Department of Transportation, as well as City funds. Construction is led by contractors Skanska Stacy and Witbeck. The new viaduct is expected to be completed in Summer of 2022.


Mary Nemick, Director of Communications, Bureau of Engineering: [email protected]