A cracked rail at the Lake Merritt BART Station will cause delays all say long, possible lasting well into the evening. According to ABC 7, the "hairline crack is inside the Oakland Y - the underground maze of trackway where all five lines converge." This means you can expect up to 30-minute delays since it's forcing trains to use single track. Plan accordingly. UPDATE: Damn you, ABC 7 news team. You made it sound like mass hysteria. Turns out BART is "back on track." Crisis averted.