SAN FRANCISCO (CBS SF) —  The Fourth of July weekend closure of a portion of Interstate 280 in San Francisco begins Wednesday night.

The highway closure between the U.S. Highway 101/Highway 280 interchange and downtown San Francisco will begin at 9 p.m. and is slated to last throughout the Fourth of July holiday weekend until 5 a.m. Monday, according to Caltrans officials.

This is the second in a series of closures planned during holiday weekends this year, as Caltrans works to replace broken hinges along the viaduct between Cesar Chavez and 24th streets.

Caltrans engineer and project manager Joon Kang said the broken hinges were discovered during a biannual inspection.

Independence Day I-280 closure. (Caltrans)

Independence Day I-280 closure. (Caltrans)

“There are many hinges throughout the entire structure, but only four of them were damaged,” he said.

Kang said the hinges, which allow for expansion, contraction and movement during an earthquake, likely took on more stress than those in other areas.

The weekend closure starts 9 p.m. on Wednesday and is expected to reopen at 5 a.m. on July 7. Traffic will be detoured onto Highway 101 during the work.

The on-ramps affected by the closure include Alemany Boulevard, the Highway 101 connector to northbound Interstate 280, 18th Street and Indiana Street.

A stretch of southbound I-280 was closed over the Memorial Day weekend holiday for the hinge replacement project.

An additional closure is planned for the Labor Day holiday weekend.

Read more on the closure from Caltrans.


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