During the 1989 Loma Prieta earthquake, the BART equipment was mostly undamaged. A 2010 study concluded that along with some Bay Area freeways, some of BART's overhead structures could collapse in a major earthquake, which has a significant probability of occurring within three decades. Seismic retrofitting has been carried out since 2004 upon voter approval to address these deficiencies, especially in the Transbay Tube. BART projects that Transbay Tube retrofits are expected to be completed in 2023.
During the 1989 Loma Prieta earthquake the BART equipment was mostly undamaged A 2010 study concluded that along with some Bay Area freeways some of BART's overhead structures could collapse in a major earthquake which has a significant probability of occurring within three decades Seismic retrofitting has been carried out since 2004 upon voter approval to address these deficiencies especially in the Transbay Tube BART projects that Transbay Tube retrofits are expected to be completed in 2023