He was joined by SEPTA leadership, union leaders, lawmakers, as well as SEPTA riders.
"We are not in times where we can afford to wait. It's time to have recurring long-term revenue for SEPTA and for the other mass transit agencies across Pennsylvania," Shapiro said.
The governor's appearance comes as state lawmakers are putting in extra hours this weekend.
SEPTA says they are facing a $213 million budget deficit.
If there is no deal, 55 bus routes and five regional rail lines will be cut in the coming months. Another 66 stations would also close.
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There will also be an end to all special sports service schedules.
"Everyone will feel this. I want to be clear. We do not want to make these devastating changes, said SEPTA General Manager, Scott Sauer.
An estimated one million transit riders will be affected by service cuts if a funding bill is not passed.
The House has passed a major transit funding bill four times, but the Senate has yet to act on it.
The latest bill includes $300 million in funding.
RELATED: SEPTA service would be cut nearly in half under new budget proposal if more funding is not secured
"That's the House passing mass transit for the 5th time. We intend to do that between today and tomorrow," Democratic House Chairman Jordan Harris.
If it passes the House, it would go back to the Senate for a vote.
In a statement to Action News, Republican Senator Joe Pittman said, "The Senate will return to session on Tuesday, August 12, 2025, at 4:00 p.m. to continue our work on common sense solutions to issues of importance for all Pennsylvanians."
SEPTA has set a deadline of this Thursday, August 14 for legislation to be passed, before it moves forward with its first round of cuts.
Those cuts would begin on August 24.
Riders say they are preparing, but would like to see more long-term spending plans put in place.
"In my community, we'll make a way. We'll find a way," said Pier Holden, of Northern Philadelphia. "I don't like how they're cutting it when school starts, to me that's a whole nother agenda, our children need to go to school, especially in the African American communities."