Golden Gate Bridge begins final phase of $864 million seismic retrofit
The Golden Gate Bridge is starting its final, multi-million dollar phase of seismic strengthening, requiring overnight lane closures starting October 5, 2026.
The Golden Gate Bridge is commencing the final phase of its multi-year seismic retrofit program, beginning on October 5, 2026. This critical construction period will involve overnight lane closures throughout the week as workers tackle the last, most comprehensive elements of the strengthening effort.
This final phase, known as Phase 3B, is a massive undertaking covering the main towers and the suspension span. The scope of the work is covered by a substantial contract, worth approximately $864 million, awarded to contractor Halmar International Final phase of Golden Gate Bridge seismic retrofit starts — Construction Briefing.
For drivers, the work will require significant logistical adjustments. Starting Monday, October 5, 2026, the Golden Gate Bridge will implement overnight lane closures Monday through Friday. The closures are scheduled to run from approximately 8:00 pm until 5:00 am Golden Gate Bridge Weeknight Lane Closures to Begin for Seismic Retrofit Construction — Golden Gate Bridge, Highway and Transportation District.
The extensive effort is focused entirely on ensuring the integrity of the Bridge. The ultimate goal of this massive, phased program is to ensure the structure remains operable and stable after a large earthquake—a necessity tied to the engineering definition of seismic retrofit.
The work on the towers and suspension span represents the culmination of a long-term commitment to maintain a major infrastructure link. The commencement of this final phase marks the active deployment of high-level engineering solutions designed to withstand significant geological stresses, thereby securing the bridge’s function for future generations.