Upgrades to the Mare Island Causeway Bridge are scheduled to begin this summer, with preliminary off-site preparations starting on July 17, which will not impact traffic. On August 4, on-site construction will commence, reducing traffic to one lane. The project is expected to last around 18 months, aiming for completion by January 5, 2027. City officials express gratitude for public patience and emphasize the importance of these repairs in maintaining the connection between Vallejo and Mare Island for the long term.
Long-awaited upgrades to the Mare Island Causeway Bridge are set to begin this summer, bringing improved infrastructure and enhanced safety to commuters.
Preliminary off-site preparations will begin July 17 and are not expected to impact traffic, while on-site construction starts Aug. 4.
Traffic will be reduced to one lane as on-site construction gets underway, and drivers are encouraged to plan and allow extra travel time.
The project is slated to last approximately 18 months, with completion expected by Jan. 5, 2027, strengthening the vital connection between Vallejo and Mare Island.
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