This is such a dumb story. The transit system in the Bay Area shut down because a vendor couldn’t do its most basic accounting. It didn’t keep track of its networks and bills.

…outage was caused by an AT&T network circuit that works between BART’s data center and Cubic’s ceasing to work, said Lalit Singh, chief operations officer at Cubic.

“That’s when we figured out that we have multiple accounts with AT&T. On one of the accounts, the payments were not made, and we couldn’t find where the circuits, which are in support of the BART system, were because they were not in our account system,” Singh said.

Critical infrastructure being run like its a hobby.