Caltrans will fully close the westbound Interstate 80 Bayshore Freeway in San Francisco, from 5th Street to 15th Street, from Friday, October 23 at 11 p.m. until Monday, October 26 at 6 a.m., the agency said in an updated advisory published October 20. Motorists must use the Fifth Street exit, which is the last exit before the closure.

Source: Caltrans District 4

Caltrans advised drivers to avoid travelling to San Francisco via the Bay Bridge this weekend and to use public transportation or alternate routes such as the San Mateo, Dumbarton, or Richmond-San Rafael bridges instead. A detour map shows options to get back onto westbound I-80 or to the I-280 freeway, the agency said.

Source: Caltrans District 4

11 p.m. Fri Oct 23closure starts
6 a.m. Mon Oct 26closure ends
5th Stlast exit before closure
71 yearsage of the viaducts

Why the freeway is closing

Crews will place polyester concrete on the westbound I-80 Bayshore freeway deck. The work completes a broader I-80 Bayshore Freeway viaduct polyester concrete placement project that began on the eastbound side earlier this year, Caltrans said, and the I-80 Exit Guide reported the same schedule and purpose, summarising the Caltrans advisory.

Source: I-80 Exit Guide

The Central and Bayshore freeway viaducts are 71 years old and carry thousands of vehicles daily near the San Francisco-Oakland Bay Bridge corridor. Caltrans said timely rehabilitation is needed to prevent further deterioration from heavy traffic loads, weather and seismic demands, and that all work is weather dependent.

Source: Caltrans District 4

For truckers and Bay Area drivers

Westbound I-80 through San Francisco will be completely closed all weekend. Plan for the Fifth Street exit detour, I-280, or an alternate bridge — San Mateo, Dumbarton or Richmond-San Rafael — and check sfhighwayprojects.com for updates before rolling.

For Punjabi truckers and commuters who use I-80 — a named trucking corridor for this desk — the closure hits the main Bay Bridge approach into San Francisco for the whole weekend, not just overnight hours. Caltrans said the finished work should preserve the viaducts, improve ride quality and enhance freeway safety.

What is solid

  • Westbound I-80 Bayshore Freeway from 5th Street to 15th Street in San Francisco is fully closed from Friday October 23 at 11 p.m. to Monday October 26 at 6 a.m., per Caltrans.
  • The last exit before the closure is Fifth Street, and Caltrans lists detours to westbound I-80 and I-280 plus alternate bridges.
  • The work is polyester concrete placement on the deck, completing a project begun on the eastbound side earlier this year.

What is only claimed

  • No contested claim in the reporting — reopening remains subject to weather, as Caltrans states all work is weather dependent.