With a Monday deadline looming, negotiations between SEPTA and Transport Workers Union Local 234 hit a snag on Sunday, according to transit agency officials.
SEPTA said it had offered a two-year contract with wage hikes of 2 percent the first year and 2.75 percent in the second year. But workers would have to spend an additional 1 percent of their wages on health-care premiums under the deal.
A walkout would be expected to be widely disruptive, as it would involve city transit lines, as well as suburban buses, trolleys, and the Norristown High-Speed Line. Commuter rail lines would not be impacted.
However, workers have not yet authorized a strike and could keep working without a contract while negotiations continue.