As the union representing the operators of SEPTA's Philadelphia subway, trolley and buses continues to negotiate a new deal, a strike on a second front looms for the transit agency and it could bring service in the suburbs to a halt.

While both unions have authorized strikes, there is no sign either union is ready to hit the picket line just yet. Neither union has declared a strike deadline.

The transit agency is negotiating contracts between TWU Local 234, which represents workers in the city, and SMART Local 1594, which represents workers in the suburbs.

Those of us who take SEPTA are all holding our breath on Monday as negotiations continue between SEPTA and two local transit unions. SEPTA’s contract with TWU Local 234, the union representing bus, trolley,

SEPTA riders should have a plan just in case the workers in the suburbs decide to strike Monday night. Services could be impacted as early as Tuesday.

Septa Suburban Union contract set to expire