On Friday morning at 3:15 a.m., a technology upgrade triggered a cascading failure across the whole BART system, shutting it down across the entire Bay Area for the morning commute. It impacted riders on their way to work, to classes, to flights. Train service wasn't fully restored until 11:45 a.m. Its the second full-system outage in four months caused by a technology issue.
One of the reasons why we don't have service is cause we were actually upgrading our computer network last night. It's a massive ongoing project. We don't just work on it one night a week. And so that is part of rebuilding BART, which is part of being a 50-plus-year-old system. It's unfortunate absolutely. We're gonna find out what went wrong.