Transit union members angry over the MTA’s biggest employee cuts in recent memory are planning to stage a rally Thursday outside the Brooklyn facility where 480 laid off station agents will hand back their uniforms.

“It’s time to kick it up on notch,” said Israel Rivera, the TWU secretary treasurer. The MTA “has compromised the safety of the train system right after a known terrorist attack.”

The agency declined to comment Wednesday.

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Union leaders have been in ongoing negotiations with transit officials, but the cash-strapped agency, which is facing a $450 million deficit this year, is moving forward with the cuts. In addition to the station agents being let go Thursday, some 700 transit workers — including bus operators and cleaners — are also facing layoffs this summer.

The transit union is weighing other rallies Thursday in the hopes of persuading the MTA to stop the job slashing.