SEPTA spokesperson Andrew Busch said the next session between SEPTA and TWU Local 34 is Wednesday, which means there's no immediate threat of a strike by those workers on Tuesday or Wednesday morning. SEPTA has met with both unions, Busch said, adding that the sessions are separate, "but they're kind of happening in parallel."

Three unions representing SEPTA employees and city workers could go all on strike at the same time. Here's an update on the negotiations.