This does not mean the union is on strike; it means leaders can call a strike at any time if they can't reach a deal in contract negotiations with the city. It's not clear when a

PHILADELPHIA (WPVI) -- Philadelphia's largest city workers union has wrapped up a strike authorization vote. However, ballots with the strike authorization voting will be counted on Thursday. District 33 represents at least 9,000 mostly blue-collar employees, including sanitation workers.

The union that represents thousands of Philadelphia mass transit system workers has agreed to delay a potential strike, saying progress was being made in ongoing contract talks.

Bus, trolley, and transit operators in the city are currently working without a contract. The last contract expired at midnight on Thursday, but union workers held off on a strike as both sides decided to continue negotiations. Meanwhile, on Friday, the union representing suburban transit workers formally voted to authorize a work stoppage.

A union representing thousands of city employees, including sanitation workers, has voted to authorize a strike. This doesn't mean they're on strike yet but it allows union leadership to call one if necessary at any time.

AFSCME District Council 33 is the largest union representing Philadelphia employees, covering over 9,000 members including sanitation workers. The union is looking for a long-term deal that includes salary increases while the city is looking for a 1-year contract extension.