The completion of the Transbay Tube's earthquake retrofit is a significant milestone for BART, enhancing its resilience after 50 years of service across the San Francisco Bay. "The best birthday gift we could ask for,” a BART spokesperson remarked.
BART's extensive upgrades included modifying seismic joints allowing for increased movement capacity, ensuring that the structure can withstand major earthquakes without major damage.
To celebrate the tube's 50th anniversary, BART released high-definition educational videos showcasing its history, engineering, and design features, including measures taken to prevent rusting.
The journey to retrofit the Transbay Tube cost approximately $313 million and involved sophisticated simulations and materials testing to ensure optimum safety and durability.
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